Compressed air for rapidly cooling motors?

[GeeTwo]

Originally Posted by Ether

.. add the reference CIM (with leads soldered together) to the gearbox ...

I'd like to suggest a simple tweak (based on an Ether post in another thread). Instead of soldering the reference CIM leads together, simply attach and disconnect the wires; this will allow you to leave the reference CIM in the gearbox all the time. As this is likely to carry significant current, a regular switch is probably not the best way to do this. I would put a power pole connector on each lead (probably both in the same oddball color so I knew this was my reference CIM), and connect/disconnect them to short/open the motor.