[BrianG]

I have a reamer too, but I personally don't like it. I find myself using the drill, dremel, and knife way more often. As far as cutting the holes first; sometimes it's easier to mark the holes before it's painted since you can see exactly where the body mounts and antenna are. If using a body meant specifically for your vehicle, that's not a big deal since there are little nibs showing where to go...