you ever notice how small screws always seem to loosen with vibration no matter how much locktite you use? i don't have that problem with big screws but the small ones holding then aluminum are always loosening. I have tried everything. double them up ect. well i took all those small screws that i don't think i will have to remove and replaced them with rivets. a good rivet gun will tighten things as well if not better then a screw driver and if you ever notice boats and planes everything is riveted and they vibrate as bad as our bicycles. a rivet is easy to remove you just use a small drill bit and take out the center.