[Chriszuma]

i was actually talking about the two-horizontal-wheel setup, whether or not i actually said that. It would mostly eliminate gyroscopic forces (except for the fact that it still has to be tilted a little bit to aim high, but this is nearly negligible). Now what i'm saying is that if you use a light enough wheel, with a low rotational inertia, gyroscopic forces won't be a problem. This, however, is a problem in and of itself; you need to have a bit of momentum carried by the wheel to shoot the balls, so finding just the right amount of mass is going to be an exercise in experimentation.