Ok, so I have a few RDAs and i need to drill some holes. How are you guys doing this? Basically what I've tried thus far is mounting the thing on an old non-working Ego battery and then trying to use my drill to make a hole. All it is doing though is skipping around and not going into the hole. It's marring up the finish on the atty housing. I realize a drill press would be optimal but I don't own one. Are there some tips or something I'm missing?