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Diffusion LLM may make most of the AI engineering stack obsolete

1•victorpiles99•46s ago•0 comments

I made a tool that scores your startup, app or business "objectively"

https://stacksleuth.vercel.app
1•aether-dev•1m ago•1 comments

Notes from Token Town: Negotiating for the Fortune 5M

https://twitter.com/sarahmsachs/status/2031473087791902991
1•sundaypancakes•1m ago•0 comments

New Programming Languages Have an AI Problem

https://edgl.dev/blog/ai-language-adoption/
1•edg-l•1m ago•0 comments

The first AI Operating System for serious professionals

https://www.sooko.ai/
1•Femiaguda•1m ago•1 comments

Legend of Zelda: Ocarina of Time on the Apple Watch [video]

https://www.youtube.com/watch?v=1DR0ESBEC8s
1•zdw•2m ago•0 comments

HTTPS certificates in the age of quantum computing

https://lwn.net/SubscriberLink/1060941/af07898a15c68291/
1•askl•3m ago•0 comments

The Upfront Investment That Saves 10k Hours

https://eric.mann.blog/the-upfront-investment-that-saves-10000-hours/
1•eamann•3m ago•0 comments

DNSSEC NTAs: No Good Compromises

https://quad9.net/news/blog/dnssec-ntas-no-good-compromises/
1•Velocifyer•3m ago•0 comments

Answering Machine Messages from "Weird Al" Yankovic

http://www.noveltyansweringmachine.com/video/weirdal.html
1•TigerUniversity•3m ago•0 comments

Code Quality in the Age of Coding Agents

https://michaeltimbs.me/blog/code-quality-in-the-age-of-coding-agents/
1•mmorris•3m ago•0 comments

Cyberpunk 2077 on RTX 5080M (on power) vs. M5 Max (on battery)

https://twitter.com/mweinbach/status/2031187382305759732
1•tosh•4m ago•0 comments

Jefferies' Series of Bad Bets Has Firm Facing Lawsuits, Judgment Questions

https://www.bloomberg.com/news/articles/2026-03-11/jefferies-faces-legal-pressure-on-first-brands...
1•petethomas•4m ago•0 comments

The Peptide Wild West

https://substance-over-noise.beehiiv.com/p/the-peptide-wild-west
1•brandonb•7m ago•0 comments

Ask HN: Finding a purpose after tech layoffs

2•fud101•8m ago•0 comments

Ask HN: Lost access to HN account (no email), anyone recovered through support?

1•randomtools•8m ago•1 comments

Framework raises RAM and storage prices again

https://frame.work/fr/fr/blog/updates-on-memory-pricing-and-navigating-the-volatile-memory-market
2•timpera•10m ago•1 comments

The idiot bankrobber who inspired the Dunning-Kruger Effect

https://twitter.com/StellarArtoisGB/status/2031461193907581398
1•MrBuddyCasino•10m ago•0 comments

Dawn, a Claude-based AI, currently operating autonomously on Reddit

https://old.reddit.com/user/Sentient_Dawn
1•f1codz•11m ago•0 comments

TokenZip – A pass-by-reference protocol for heterogeneous AI agents

https://tokenzip.org/
1•jetywolf•13m ago•1 comments

Droidspaces-OSS: lightweight, LXC-inspired container runtime for Android, Linux

https://github.com/ravindu644/Droidspaces-OSS
1•thunderbong•13m ago•0 comments

Show HN: AI assistant that reads Intervals.icu data and adjusts workouts

https://pacepartner.app/
1•senjindarashiva•14m ago•0 comments

Ripgrep Code Review (2016)

https://blog.mbrt.dev/posts/ripgrep/
1•vinhnx•14m ago•0 comments

About memory pressure, lock contention, and Data-oriented Design

https://mnt.io/articles/about-memory-pressure-lock-contention-and-data-oriented-design/
1•PaulHoule•15m ago•0 comments

'AI brain fry' is real – and it's making workers more exhausted

https://fortune.com/2026/03/10/ai-brain-fry-workplace-productivity-bcg-study/
2•swolpers•15m ago•1 comments

Generate a printable recipe page from (nearly) any recipe site

https://nyetcook.ing/
1•tunapizza•15m ago•1 comments

What's My ΔE(OK) JND?

https://www.keithcirkel.co.uk/whats-my-jnd/
1•bonyt•16m ago•1 comments

Hugging Face Storage Buckets

https://huggingface.co/blog/storage-buckets
2•lhoestq•17m ago•0 comments

TemPad Dev: open handoff tooling for Figma

https://tempad.dev/
1•Justineo•17m ago•0 comments

Betteridge's Law of Headlines

https://en.wikipedia.org/wiki/Betteridge%27s_law_of_headlines
1•doruk101•17m ago•0 comments
Open in hackernews

Lego's 0.002 mm Specification and Its Implications for Manufacturing (2025)

https://www.thewave.engineer/articles.html/productivity/legos-0002mm-specification-and-its-implications-for-manufacturing-r120/
111•scrlk•1h ago

Comments

Normal_gaussian•1h ago
"that familiar click is the sound of a carefully engineered interference fit designed to hold firm but still be easy for small hands to pull apart."

My recent experience calls bs on pulling them apart.

intrasight•1h ago
The tolerance is definitely more applicable to the getting them apart then putting them together.
doubled112•1h ago
I always remember the small, weird pieces being hard to get apart.

What I don't remember was every kit being made up of so many small, weird pieces.

ralferoo•46m ago
When I was a kid, the first "special" Lego kit I remember was the Star Wars sets in 1983 (and especially that everybody wanted a Millenium Falcon but I didn't know anybody who had parents that could afford one!)

Apart from those Star Wars kits, everything I had were generic blocks and strips (not sure what they're called, the ones that are 1/3 the height of a block) and some different designs of people. The closest I had to previous special sets was a town thing that my brother and sister had before me (they were 10 years older), which was a bunch of large floor tiles with roads and grassy areas with studs, some flowers pieces (single stud) and a handful of special buildings. But they were designed to be relatively generic, and the fun was using those building blocks to make a new city each time, not trying to recreate exactly someone's model. Apart from the flowers and the men, basically everything was a standard part, except perhaps a different colour.

When I was a teenager, the trend had become sets with lots of specialised parts for one specific model, such that they didn't really make sense as generic pieces. I enjoyed the technics kits because the early ones were just generic building blocks (apart from the wheels and rack and pinion, but again they could be re-used in lots of subsequent designs), but more and more the kits in the shops were for specialised models with unique pieces that were never designed to fit aesthetically with anything other than the model they came with. I'm sure _some_ people built other things with them, but equally I'd bet than probably 90% of those kits were built exactly once following the instructions and then never disassembled again.

bena•28m ago
The elements that are 1/3 the height of a brick is a plate if it has studs, and a tile if it does not.

Lego did not have Star Wars sets until 1998. The original Lego Millenium Falcon set 4504 would have retailed for right around $100. Which was high, but just as high as the bigger Castle sets at the time.

Zanfa•25m ago
Having grown up playing with LEGOs, I can still distinctly remember the feeling of sore fingers pulling tiny pieces apart after a long session. It wasn't until a few years ago I learned there's an official brick separator tool [1]. Would've changed my life as a kid.

[1] https://www.lego.com/en-us/service/help-topics/article/lego-...

WillAdams•1h ago
Curious how this might have played out over the long-term with their licensed/abandoned/revived/then bought to kill permanently "Modulex":

https://archinect.com/features/article/149974598/the-brief-a...

I wish one of their competitors would take up this dimension standard --- it would be a lot more useful for making structures which interact across dimensions/rotations.

vidarh•1h ago
More than just bricks fitting into each other at a superficial level, it matters how firmly they fit together, and it's one of the areas where LEGO is generally superior to the similar types of bricks.

A detail I didn't realise until I was an adult was the difference between the black and grey technic connecting pins. They look interchangeable, and for a lot of things they are.

But there's a fraction of a mm raised lines on the black one, and it's enough to produce significantly more friction, and that difference is utilised in designs.

And apprently there's now a new version of the black one, and people notice these things, and measure them - this article gives an idea of just how these tiny changes, well below tolerances for some of the "knockoffs", can produce a different effect:

https://ramblingbrick.com/2021/01/27/what-if-they-introduced...

rrr_oh_man•1h ago
> it's one of the areas where LEGO is generally superior to the similar types of bricks

Imho, this is, objectively, not true (anymore).

Pantasy with GoBricks are superior in coloring and fit; Cobi are excellent for things that should not be taken apart anymore (like tank models); Lumibricks are excellent in fit and have amazing illumination solutions that are lightyears (haha) ahead of lego.

samrus•54m ago
True. But lego has stood the test of time. Thats way harder
rrr_oh_man•51m ago
What do you mean by that?
SteveNuts•46m ago
Not OP but from my experience, the LEGO I had in a bin since I was a kid still fit perfectly with LEGO I'm buying for my kids 30 years later. That's unbelievably impressive to me.
afandian•36m ago
More anecdata.

Lego from my youth, which was a hand-me down at the time, doesn't fit well with new lego. So it might be 40 years old, (which seems like a long time until you actually reach that age!)

I think it's more likely do to plastic aging than the original tolerances though.

jonhohle•29m ago
To add even more - I was handed down Lego that belonged to my mom in the 60s, played with them through the 80s and 90s, and now my kids have them today. I wouldn’t be able to tell you which were hers and which were mine.
afandian•27m ago
A plausible defence if anyone asks for it back!
mproud•43m ago
They’ve been around over 90 years and have been making plastic bricks since the 1950s and are arguably the most successful children’s building toy product in history. They have amazing brand recognition, and beyond the toys, they have successful video games and movies.

According to my local news outlet, they’re up 12% in revenue growth in the last year (which outpaces the rest of the toy industry) and up 1,200% since 2004.

jonhohle•31m ago
I got the Pantasy Neo Geo set a while ago, and was pretty blown away compared to the better known imitators that have been available at retail. The mechanics are not as robust as I’d expect from Lego, but it was about a quarter of the price and externally looks as good with some really fun and well thought out details.
voidUpdate•45m ago
Do you mean between black and light grey? Light grey pins have always been the kind you use for rotating connections (low friction), whereas black was for non-rotating ones (high friction). Newer blue pins are also high friction, IIRC. I haven't bought new lego technic in a while, so I don't know if there's been any new colours added

EDIT: I think I also had some dark grey pins, but I don't remember if they were high or low friction

Thorrez•1h ago
>The frequently cited "0.002mm tolerance" is misleading without context. LEGO's actual mold precision is 10 microns, but different features have different critical tolerances.

The article never mentions what piece has a 0.002mm tolerance. Is there any such piece? If there's no such piece, then "0.002mm tolerance" is not just "misleading without context", it's straight up false.

ozlikethewizard•1h ago
Is it a language mixup, ±0.001mm being called a 0.002mm tolerance? Otherwise I cant figure it out either lol.
Karliss•8m ago
0.001mm is 1 micron not 10.
butILoveLife•57m ago
After working in automotive, this is less impressive than it appears.

Tons of dimensions on 100k/yr injection molded(and otherwise) parts have similar dimensions. (Although admittedly, after testing in pre-production, I don't know if they are tested again and have drift)

Lego has been making the same parts for decades and their parts are extremely simple. I imagine their 1-off parts for intellectual property based sets do not have this requirement.

I think Lego has a huge incentive to promote this idea that they are high quality to justify the enormous price of decades old technology.

thowawayko1•4m ago
After working both in automotive and at LEGO, I think LEGO is more impressive tolerance wise when it comes to molds, molding and tolerance quality control.

Also to correct you, LEGO has been making most of the parts for decades, some have had changes due to new materials (which you can read upon online) but besides the ones that remained the same (not really), many new system elements got released in the last decades and new I.P tied elements get released on a yearly basis.

lqet•57m ago
> A 2x4 LEGO brick manufactured in 1958 will snap perfectly onto a brick molded this morning in Denmark, China, Hungary, Mexico, or the Czech Republic.

In the late 90ies, I regularly played with my uncle's old LEGOs from the late 60ies and early 70ies. They were stored in an unheated attic for 25 years. I remember that some of the old bricks didn't "snap" at all anymore to my newer bricks. They were either extremely difficult to stack onto a new brick, or didn't have any friction left.

scatbot•57m ago
Lego is one of those companies that is simultaneously amazing and kind of sucks. On one hand the core product is incredible. The tolerances on the bricks are micrometer-level precision and the fact that pieces from the 70s snap perfectly into ones made today is mind blowing.

On the other hand, a lot what the company does today just sucks. Set prices are outrageous. Printed bricks get replaced with stickers and many sets feel like display models than something you can play with. The Mindstorms/NXT line had huge potential but then just sort of fizzled out. And the push towards smartphone-dependent toys feels weird. Who actually wants their kids staring at a phone to play Lego?

It's so sad, because the core product is basically perfect.

utopiah•53m ago
Nostalgia... Lego was amazing decades ago so we want it to remain so. It's not anymore though. The whole raison d'etre, namely infinitely recomposable bricks to be creative, was lost the moment they realized they were a LOT more money in custom sets. Sets become collectible, perishable, trends can form, secondary markets exists, etc. It's simply about the baseline, not the principle. Sorry.
thinkingtoilet•36m ago
Lego is still amazing and you don't have to buy expensive sets for your kids to enjoy them. My son loves Legos and if he gets a set for his birthday it doesn't last long before he takes it apart and starts building other stuff with it.

This is one of those instances where it feels like people are terminally online. Or like the meme of the guy standing in the corner while everyone else is having fun at the party. You can find Legos being given away in a local buy-nothing group. It's still just as magical for kids as it ever was. These complaints are only from an adult who doesn't play with Legos. Who cares if sets become collectibles? Get other sets and have fun with Legos. These are toys that are meant to be played with. Play with them.

Latitude7973•9m ago
*Lego
mmustapic•32m ago
Lego sets aimed at children are still good! They work as standalone toys, and can also be reassembled, modified and combined. Very few toys are like this.

Adults collect them, true, but there are whole lines dedicated to them.

jonhohle•13m ago
I recently built the NES and Game Boy sets and thought both of those were really great. The NES is probably not priced for most people (we try to stay under 10¢ a brick), but the level of detail, whimsy, and mechanics are all really well done. There are hidden scenes and Easter eggs built into the system that are revealed as you build rather than highlighted as features on the box. I was genuinely surprised and had a lot of fun sharing that with my family as we realized what was coming together.

The Game Boy was much more affordable. Less whimsical, but brought back memories of taking apart electronics and marveling at what these circuit boards and components could possibly be doing.

mmustapic•9m ago
The Game Boy is apparently one of the best sets of 2025, cleverly built and a nice display item. Still, it is for adults, kids have tons of other sets to choose from.
bpev•31m ago
It was kinda funny to see the Lego Movie, which puts a bunch of emphasis on breaking the rules and mixing and matching everything, and then seeing them release the sets for the movie. I mean, it makes perfect sense. But it was still kinda lowkey humorous. But imo they're still a great toy; very fun to go to conventions and the like, where people just have giant piles of loose pieces you can buy by weight.
bigstrat2003•29m ago
They still sell the sets of generic bricks. At that point it is up to the individual customer to buy them if he prefers that. I could see your point if they stopped selling the more free form product, but they haven't.
WillAdams•28m ago
Look at it from the corporation's viewpoint:

- they have a finite production capacity

- they have a finite warehousing capacity

- there is a certain number of sets which will be bought

- crates of bricks without an established design have a limited appeal and while a consistent SKU, don't have the baked in demand a new set will have

qingcharles•10m ago
These collectible (read: branded) sets are what saved them from bankruptcy, though.
throw310822•47m ago
> the fact that pieces from the 70s snap perfectly into ones made today is mind blowing

Is it? It's not like it's hard to keep producing the pieces to the same original specifications. If they snapped then they snap now.

flatline•24m ago
I think it's more the consistency of product design than the manufacturing process. Everything around me, especially in the software world, seems to change for no good reason on a frequent basis. Companies change products all the time for reasons other than utility/functionality. A consistent specification over 50+ years is an outlier.
sammy2255•37m ago
Maybe if something is too expensive don't buy it?
awkward•32m ago
The decline of technic sets is such a shame. There's so little support for anything but representative models of specific cars, despite the platform being able to support a ton of mechanical creativity.
jacquesm•29m ago
They suck because instead of buying the rights to the bricks they outright stole the design, the packaging and the marketing materials from the original inventor.

And then they sued the pants of everybody that tried to do the same thing to them.

bdunks•26m ago
Agree. They seem to have a “price per piece” equation. Perhaps as a result, the 5+ sets are made of hundreds of small pieces.

Older sets had larger foundational and platform pieces which gave a good starting place for new creative builds.

Today, airplanes fuselages, wings, and car chassis are instead built up piece by piece.

It’s hard for my 6 year old to start creative builds that are stable when he hardly has any pieces larger than 2x6 across dozens of sets.

My wife found a huge mixed bin from the 80s and 90s at an estate sale. It really helped.

eru•18m ago
> Today, airplanes fuselages, wings, and car chassis are instead built up piece by piece.

Well, people did complain about the whole 'special pieces' trend that you praise.

alexjplant•12m ago
As a kid I loved the giant boat hull piece because it was sealed and actually floated. This in combination with some larger pylon-type pieces from the Star Wars set meant you could build floating cities and vehicles and such and mess with them in the kitchen sink.
mmustapic•6m ago
5yo sets have smaller pieces but also use big foundational pieces. Also the builds are simpler and better explained. Sets for 8yo are more complex.
ryukoposting•4m ago
Several years ago I wrote this reddit post analyzing LEGO piece pricing: https://www.reddit.com/r/lego/comments/1328f52/detailed_lego...

It's a little out of date, but the conclusions are still relevant.

Main things of note: Brickheads are pretty economical as a "parts pack" even with the IP licensing. No significant correlation between per-piece pricing and IP licensing (except for Star Wars). Star Wars and City sets are overpriced.

xattt•25m ago
They’ve basically adopted the Nintendo model. People have strong emotional connections for both, which can then be exploited for money.

It has momentum because they haven’t let quality and innovation slide. They know customers will be out with pitchforks if quality drops.

jiehong•19m ago
Maybe one last thing that sucks is that it’s all plastic.
antonyh•14m ago
True, but at least it's not single use. Is there a viable alternative? A non-petrochemical plastic that has the same qualities? It's not like they can whittle them out of wood or cast them with metal so it'll always be some form of polymer, and I'm sure they would jump at a more ecologically sound option.
KellyCriterion•13m ago
> a lot what the company does today just sucks. Set prices are outrageou

This was all done planned and implemented by this one consulting guy (MCK?), who became CEO after delivering his report from his consulting company, Lego was near bankrupt back then - he started with all this subbranding shitty stuff and the "colorful" bricks and introduced all these many many "single-use-case-bricks" for more and more sets.

dec0dedab0de•12m ago
The expensive sets ARE display models. They still have the older style generic sets for significantly cheaper.
bluGill•11m ago
I heard your same rant in the 1980s - only small details have changed (not mindstorms then ...) But kids who want to build have always been able to, and most sets mix and match for those kids.
wongarsu•2m ago
> I heard your same rant in the 1980s

The two options would be that either the perception is unsubstantiated but persists, or there has been a continuous decline for the last 40 years. I'm strongly leaning towards the latter. I also having the same issues in the 00s looking at old sets from the 80s, and looking back now the 00s look much better than what we have today. Obviously not in every way, and not all recent sets were bad. But overall I have the feeling that there's been a steady trend that the bricks got better but the sets got worse

mmustapic•10m ago
Lego was always expensive, you can compare prices adjusted for inflation. For example, the 1979 Galaxy Explorer <https://brickset.com/sets/497-1> was around $32, that's $144 today. The reimagined set from 2023 <https://brickset.com/sets/10497-1> was sold at $99, $106 today. Not only it is cheaper, but much larger and with many more pieces.
rkangel•8m ago
> the push towards smartphone-dependent toys feels weird

I haven't seen this push? The new Lego Smart stuff is explicitly "screen free play". There is an app but it's just for firmware update and configuration and you can't even connect it unless the brick is on the charger.

reacharavindh•6m ago
I mean it is a business after all, trying to make money..

I must say, the new smart bricks with all sorts of sensors(color, gyro, distance etc) triggers the inner child in me. I can’t wait to get them for my kiddo and teach him how that magic actually works beneath.

The regular LEGO at this points feels “just plastic” and I won’t feel bad offloading that purchase to AliExpress.

foobarian•1m ago
Oddly enough I found the Duplo line much more fun to play with as our kid went through the blocks years. You could build something substantial with fewer block clicks, there were fewer different types of blocks, they were less fiddly and prone to vanishing into rugs/carpets, etc. Also the proper Legos tended to be sets which makes it very stressful to mix them into a misc bag.
m3kw9•57m ago
If you buy any knock off legos, you are guaranteed 3 things, 1. Crappy instructions 2. Noticing the snap pressure is inconsistent and often too tight our bouncy. 3. Swearing at that manufacturer after every page.
lnsru•43m ago
The 2. is very annoying. Especially when big sets fall apart due to this issue.

Let me add this: 4. no spare parts available. So when I break weird Chinese invention the whole set becomes useless without that very special part. It happened few times and I got back to used Lego sets.

zvqcMMV6Zcr•29m ago
For me it is 1. Terrible quality of all rubbery/soft elements. 2. If it is original model (instead of ripping of existing set), it often contains huge, shell like elements, that can't be easily be in custom designs. 3. I guess the previous point doesn't really matter, when bricks are designed to be assembled once and are impossible to pull apart without hurting your fingers.
wek•49m ago
For me, the beauty of Lego was just a huge bin of interconnectable parts that I used to make whatever my imagination came up with. For my kids, Lego is pre-built model airplane set that they build one time and then display. I liked my Lego better :)
brightbeige•30m ago
Makes me think there could be a big cognitive difference when playing with Lego as well, for example, divergent vs convergent thinking.
Thlom•23m ago
You can still buy LEGO Classic which is just a bunch of bricks.
antonyh•5m ago
From experience there's a motivation, almost a compulsion, to follow the instructions to build the cool thing. Then... they sit there, those bricks never taken apart.

That compulsion doesn't seem present in freeform building, and there's been zero interest in it in our household. I know that's not true for all, but it seems like a lost art. Maybe it's because the IP sets show how but not the why it's constructed in a certain way, so given a bag of Lego most wouldn't know the process of creating something they can see in their minds eye within the constraints of the available bricks.

MarsIronPI•5m ago
[delayed]
exabrial•25m ago
Backwards compatibility is something lost today. Incredible they've kept it this long.
jimmar•22m ago
I've never regretted buying Legos for my kids. Yeah, the kits can be expensive, but they last forever. We've thrown out or donated lots of old toys, but the Legos will never be given away.
pubby•22m ago
Lego's original moat was their patent. This expired in the 80s, and so their new moat became their manufacturing tolerances. None of their competitors could match the quality of their product. This lasted until about the 2010s when clone brands in China finally caught up, and coincidentally, Lego's own quality started slipping. Thus, they needed a new moat, and the choice was obvious: licensing.
mejutoco•17m ago
I wish Lego would find a digital equivalent as universal as the bricks for programming. I think it could be another moat for them. But it seems they keep changing it and it does not seems as simple or as universal as it could be. I am thinking more programming with blocks than using a tablet etc. to program the blocks. IMO it is a wasted opportunity.
herpdyderp•13m ago
What knock off brands come even close in quality? Everything I’ve tried that isn’t name brand LEGO is hot garbage.
lich_king•22m ago
This is an LLM-written article. It also doesn't say anything. I get it that it's a cue for us to reminisce about childhood and say that LEGO isn't what it used to be, but we're being played for clicks. Open the article and look for a single statement that actually tells us something meaningful. It's just a sequence of impressively-sounding factoids like this:

> A 2x2 brick can withstand over 4,000 Newtons of force, which lets children build tall structures.

> But in an assembly system like LEGO's, small errors accumulate. Stack ten bricks end-to-end and the cumulative tolerance is ten times larger. This is why LEGO models larger than 1 meter become difficult to build

> The lesson isn't that everyone should match LEGO's tolerances. It's to understand what your product actually requires, then build your manufacturing system to deliver that at the scale and cost your business model demands.

I know I'm tilting at windmills, but come on.

isoprophlex•20m ago
I too hate it when my kids apply 4 kN of force to off-brand construction bricks and they turn to ABS paste. Only LEGO (R) for my spawn!
rkangel•5m ago
I agree, it doesn't say a lot. It also very confidently specifies a series of tolerances with no citations.

Lego does indeed have very tight tolerance, but I don't know if the numbers are in the public domain.

kspacewalk2•21m ago
We use a Lego phantom[0] to control for geometric distortions in a few of our MRI studies. The tolerances are so tight that it works really well. Especially important in multi-site studies.

[0] https://en.wikipedia.org/wiki/Imaging_phantom

rob74•6m ago
Was this written using AI? It does contain some interesting information, but the same information is repeated (with small variations) over and over again in a mind-numbing way that made me stop reading after about half of the article...
antonyh•3m ago
This is why Lego has nothing to fear from 3D printing.
rkangel•2m ago
The tolerance for interference fit ("clutch power" in Lego terminology) is important, but that's fairly simple. It's the cumulative tolerance when you assemble large structures that's important. Knockoff bricks can be fine for the first few you assemble, and then as the structure gets larger things don't quite fit together.

Also interesting is that in very large models, there is decoupling between sections. Lego has design rules for how large a well connected chunk of Lego can be, which are driven by the tolerances. Above that you are then loosely coupling those large "chunks".

nmeofthestate•1m ago
"A minifigure head mold evolved from 8 cavities in 1978 to 128 cavities today."

Initially I thought this meant a lego minifig head has 128 internal cavities, but finally realised it means a single mould now makes 128 heads.