Removing a stripped allen head screw isn’t hard if you have the right tools and know what to do… It’s as easy as using a Dremel with a cutting wheel to score a deep enough slot in the head of the screw so you can easily back it out with a flathead screwdriver.
After a last minute decision the night before a big RC meet I realized both screws holding the Castle 2200kv motor to the Slash 4X4 motor plate were stripped, this brushless setup needed to go back in my E-Revo so I broke out the Dremel and got down to business.