[Overdriven]

If you've still got grinding then there's something else still wrong. Other bearing, bad bearing parts inside motor, bent rotor shaft. The wrapping is carbon/Kevlar thread with expoxy holding it together like a high strength fiberglass. I definitely wouldn't go cutting any of it off and would be prepared to rebalance if attempting a repair.

Idk what Castle has as far as motor repair capabilities, wrapping and balancing rotors may be something that's only done in their factory or for prototypes. I know Castle wasn't keeping many spares after the motor sale. Neu might be willing to help you out if Castle can't.