Cluthbell screw problems
#2
get a better screw. AP hexscrews are coated with something and have more tighter fit. or try spring washer thats used on motor mount. never had any issues with clutch screws with bit of blue loctite. actually moved to a weaker purple one.
#3
loose screw
hmm check and see if its the right size screw , a small screw will back out even with threadlock .try changing the screw and clean the screw hole out for better adhesion for the threadlock .ialso the clutch bell should spin freely when the screw is tightened if not check the shimming of the clutch bell and remove 1 at atime til it spins free ,if your still having problems take it to a local hobby shop for more help