As stated in another thread below, I am building a hardtail Strat. On the body I have, the 1/8" string through body holes are predrilled in the proper locations. OK, now I have to locate the bridge (seems quite simple) and install the little 5/16" diameter string ferrules in the string holes from the back of the body. Sounds easy, but I decided to practice on an old 2 X 4 just to see how it would work...smart move! Using a brand new 5/16" drill bit to enlarge a 1/8" hole to 5/16", I got a hole big enough to drop the ferrule and its flange in the hole. Woah, oversize or unstable drilling. So, how do I do his properly? Do I just creep up on hole size by using bigger and bigger drill bits, or do I have to drill undersize and buy a precision 5/16" reamer to get properly sized holes for the ferrules? Or do I need to buy some of those "splined" ferrules that actually push tight grooves when installed? Funny how little things can become big problems. At least I had the sense to try this on some scrap wood first!! Help!!