I'm giving 3 thumbs up to the stuff in this video. Milwaukee's Rotary Tool seems to work as expected. Dremel's quick connect cutoff wheels work good and so dose the cheep carbide burr set.
Milwaukee M12 Cordless Rotary Tool
https://amzn.to/3L1eWeE
Dremel EZ40602, EZ Lock Starter Kit
https://amzn.to/3EioxtG
MarsRock Carbide Burr Set
https://amzn.to/3PrW6QF
Contact info and other stuff I use
https://direct.me/funk_fpv