[MrForbes]

our failures included:

operator interface (!) had to borrow one

motor/transmission, using the DeWalt transmission, gear slipped on motor disabling drive on one side, we had two spare assemblies because we had to remove 2 of the original 4 drive motors to make wieght

some physical damage to a "crash bar" resulted in a roller breaking in the robot. They sold 4" ABS pipe at the hardware store across the street from the venue so we made a new roller.

Also we had the KOP transmissions which we did not use on our robot, but loaned to another team to help them get going when they had problems.

I think this might show that you really can't anticipate what will go bad, so bring what parts you have, and hopefully you'll be able to find what you need or improvise a fix if you have any failures that you don't have spares for.