The only holes you drill are under the the hood and those are for the locking mechanism. Drill them, put some silicone caulk in the holes, put the screws in and there you have it. No big deal. Right now, I feel it is the best top out there. Jeff Lemke is making a top right now that looks pretty good also. Only downside is you have to have Autoform windows. I absolutely LOVE my Autoform top! I have gotten a lot of compliments on my top from members of the Illinois VCA and the Minnesota VCA members.Autoform requires drilling holes - forget it!