@faytree I made something with kinda the same design (please check my scenes) and in the Process of making I found the thing with the wheel the best way of doing the timing. You can just shift the cubes around to adjust the timing, rather than having to rewrite values all the time and not really having anything visual to look at.
WOW this looks pretty cool. The mechanism is both simple and clever. Would somebody please also check out my scenes? i make machines (scripted though) that make octagons or circles fully automatic