I'm real happy for you, and imma let you finish, but you're about to make the worst mistake of your entire team career.

Honestly, the CIMs have been nicknamed the drive motors for a reason. Any team anytime (except 2009 at times) not using 4 CIMs in their drive is at a HUGE disadvantage in power compared to every other team competing on the field. If all else fails, your drivetrain will still work, and with 2 CIMs you're running at half a drivetrain. Half a drivetrain vs. a full one will leave you in the dust, possibly with something broken.

I can almost assure you that your problems were completely unrelated to the use of 4 CIMs. The problem was your chains, your sprockets, anything else, but not the motors. The motors have no relation to the chain. They don't make things go faster than they normally do. Switch to #35 chain. It's stronger than #25 chain by a lot, and many teams (330 to name my favorite) have used them successfully.

This is from friend to friend, FIRSTer to FIRSTer. Making a decision like this will be as good as chopping your c-rio in two.

And I'll ask you this: Why are you blaming it on the extra CIMs? Nowhere in your passage do you say why the CIMs themselves are causing the problem. Reevaluate the event, and what was directly involved in it.