Nothing works for me except a 'divet'. Make a small flat spot, if no flat spot already. Then use the tip of a stone dremel thingy (This will wear it out after a few of these) to put a crater just a little bit bigger around than the set screw. Then use threadlock. The set screws balance should be ofset by the flat spot. Make sure to place the 'crater' in the right spot, or youll have to make another on the other side. I have a 5 cell (lipo) brushless losi 8ight from 2006 all custom. this works!!! Good Luck