[Johnbot]

Yes, you can cause the rear wheel to run slower if it is driven off of a second Victor. You don't necessarily have to put a limit on it, but you could have it scale. (I.e. if you run the front wheel at speed X, you can run the rear wheel at speed 0.80*X)

Anyways, I don't see anything wrong with doing either, but that's just on the software side.