[EricH]

Originally Posted by SuspectZero

ok so if my understanding is correct, 2" cim motors from last year or the year before cannot be used unless they are used as a back up. we have 4 cim motors currently driving our robot (2 from last year and 2 from this year) and we are planning on using one more (from last year or 2 years ago) to lift an arm. is that still not allowed?

The one on the arm is NOT allowed, unless you have three or fewer on your drivetrain (<R59>). The drivetrain you have now is legal, per this Q&A.