Hi, I have these same tuners. Yes they were time consuming to install. I used a straight edge to line them up, then pressed down to mark the wood with the pins. Then I drilled out the holes. I don't remember what bit size I used but it was enough to make them fit snug. My issue with these, and not sure if it's normal (hint, hint, question here, anybody know?) is that they seem to have a bit of play in them. While tuning, if you go a little sharp, when you go to loosen the peg you get movement before it actually starts to lower the pitch. Then more movement when you bring it back up to pitch. It happens everytime you change directions. I would say, comparing it to the face of a clock, about 10 minutes worth of movement. Is this normal, maybe I got a bad batch. I've kinda learned to live with them now but was just wondering.