I've just finished creating my own version of aiyuki's fast ball sorter. will be a while until I get around to doing any sort of LDraw file but from the test's I've done so far it seems to work quite reliably. It's always hard trying to reverse engineer off a video, and I had to make my own mechanism for part as I couldn't see the inner workings. I applaude those working away at some of the more complicated modules here.