Another pounding stone theory unfortunately.

We know that the Inca didn't build Sacsayhuaman because they said that they didn't.

Anyone who has ever built anything can tell you that pounding stones don't explain this superb stonework. Not only is it an incredibly laborious process that you would stop after 20% of the effort for 80% of the result, but you can't achieve a fit like that after any amount of time if you don't have a comparably precise method of measuring the fit. Putting the stones next to each other and eyeballing it won't do.

Thanks for sharing the marvellous article, is all I can say.