[EricH]

Originally Posted by jgraber

What part of the rules do you think would be violated by using 7 toughboxes?
You can use a maximum of 4 CIM motors, (2 included, and 2 you buy), so maybe someone is conflating CIMs with Toughboxes.
What other kind of motor would you want to use with a Toughbox?

As suggested above, an FP with an AM Planetary. You could customize other motors to go into a Toughbox (or other AM gearbox), but most people don't.