[KenWittlief]

I would be concerned about using the CIMs for a long amount of time. They do not have cooling airflow like the drill motors do. If I remember correctly the CIMs were designed for short use, something like raising the front trailer wheel on a camper.

Of course you can modify the motors for non-competition use, but I dont know if they even have the internal blower blades like the drill motors do?

You might want to look into something like an electric scooter motor, or electric wheelchair motors - something that is designed to be run continuously.