loosen1 grub screw,remove the other,put hex's on till just touching the washer tighten 1 grub, locktite the other then install it, then remove previous grub, locktite that one. Put locktite (Blue on everything) the wheel nut. DO NOT super tighten the wheel nut. Find the sweet spot and repeat for the other 3 wheels. It is a lot of work but you will get better at it as you do this a few times.