I bought a bass that has 2x2 Y style tuning keys that are I believe 3/8 in diameter on the headstock. I want to swap them out for some Hipshot Lic Ultralights which I think I need to increase the hole size to either 1/2 or 5/8. I will measure to make sure once it arrives. Is there an idiot proof way to enlarge the holes? I don’t have a drill press - I do have some nice hand drills with forstner bits, etc. But what is the easiest way to do it without potentially jacking up the headstock? Sorry if this is the wrong place - I wanted to ask the woodworking experts. Thanks!