Stomping during heavy gigging and touring can cause the set screws to come loose from time to time. Use a drop of Blue loctite on the threads to ensure your buttons never come loose no matter how many miles you put on them. Resealable loctite container is enough for 40-50 buttons!
NOT FOR USE ON CLEAR ACRYLICS!!! (Warranty voided if loctite is used on clear acrylics)