I posted this in my build thread, but figured I should expand exposure by putting it here instead. Question: I have a set of Fender 0994918000String Ferrules. From my understanding, I should do a 5/16” hole with around a 3/8” counterbore. Those measurements don’t really match up with what I measured on the ferrules. Anybody use these ferrules (or other vintage flanges ferrules) and have any insight on the sizes? Thanks!