[MikeDubreuil]

We've developed an excellent solution for this. I'm fairly sure it's not an original idea, however I don't know who to credit it too.

Our drive train consists of 4 drive modules. Two are powered by the Chips, and two are powered by the drills. The motors are mounted horizontally, making their polarity/wheel direction the same. Worm gears are used to transfer the power horizontally to vertically (to the wheel). With a little programming and gearing the motors spin at about the same RPM.

Even with using the sticky pneumatic tires we've never blown a fuse. We also rarely lost a pushing match. Our only problem is that we had turning problems, IE: hopping. I think we're going to solve that via some omni-wheels. With some tweaks in the off-season, we are going to make this our standard drive train.