I use a strap from "Whipping Post." Very thick and to install it I had to remove the PRS buttons, push them through and then screw them back on. On my other guitars, I use Dunlops. Schallers are cast pot metal and can fracture, Dunlops have stainless steel stamping which in this use is an advantage; parts would bend before breaking. Most of the people I know don't worry about changing screw hole sizes- to restore the original buttons and screws, just shave part of a toothpick, thin some PVA glue and stick it into the hole along one side; after it dries, turn in the original- it won't show and will be as reliable as when new.