Now if you have a drill press, this step will be a breeze. If not, then, like me, you just have to be careful. You are going to be drilling at inside star points. It's kind of hard to explain, so look at the image for reference. You are going to use the 3/8" drill bit for these holes. If you don't have a drill press, it would probably be easier if you use a bit about half the size to drill a hole first. It's hard to get a big bit to go exactly where you want in one shot. You can be more precise with smaller bits. Also, if you want to counter any wind blowing it off target, drill a hole in the center.