I haven't seen a guide like that, but it would be interesting. It amazes me that they were able to get the CADC to work, since it is a complicated 3-D task to get all the gears to mesh without colliding. Since the gears need to be in particular ratios, there are a lot of constraints. The clearances in the CADC are very tight, by the way. It was hard to reverse-engineer because many gears looked like they meshed, but they didn't quite mesh.