You should be good man. Ive got slots cut in my sc 10 for the servo wires. Makes everything alot cleaner and u dont gotta worry about the wire stretching out of the housing. Ive also done it on my slashes as some of my lipos have large diameter wires. It works fine. Ive seen some people dremel away there chassis to swiss cheese and they dont have any problems. Small cut like that would be fine. Round off ur edges tho as rubbing can cause the wire to run alot