Recently came across this website after watching this https://www.youtube.com/watch?v=EpxSaOiT2LE. Seems like a cool hobby to try for when I'm finally replaced by AI. I knew about the sling from movies but I didn't know this is actually a thing to do. Very impressed how far you can sling something with it (477m/1564feet). Sharing this in case someone is on the hunt for a new cool hobby.