I can't see it failing to pass muster. It's more complicated than most proofs of Pythagoras's theorem I know, but it's still simple enough that several people

I can't see it failing to pass muster. It's more complicated than most proofs of Pythagoras's theorem I know, but it's still simple enough that several people have reconstructed it from just a diagram and some basic notes on how it should work. For so many people to have now independently reconstructed it without anybody finding issues is a clear indication that, even if the way they wrote it up has mistakes, the core ideas are solid.