HELP with drivetrain decision

[geowasp]

alright, so we originally had 4 CIMs driving our chain drive(2 on each side, 2 to a gearbox), but due to weight requirements, we had to remove two of them (so we are left with one on each side. the drivers said there wasn't much of a difference in driving it, but after seeing the webcasts.... the was loads of pushing and shoving, so is losing some weight on another aspect (dunno if we can, but we didn't have too much time to accomplish that at end of build season) to gain the 2 CIMs going to be beneficiary?? Or is it okay to only aadd one to one side? wouldn't that make it lopsided? I mean, if we can outpower the other bots.. then...but the question, of course, is can we outpower even if we do have 4 CIMs, maybe it's not a question of pure motor output. Denver regional in about 4 days, we have thursday to make changes... SO... i need some advice, and I'm also wondering what you guys are using to drive your bots.