Hey all, I'm sure this has been discussed adnausem, but I have a couple of questions for the do it yourselfers in here. I have three Gen 4 G23's in various colors. One is at Cold Bore getting a pro treatment, one is gonna be left stock, and the third is currently my DIY project. I got some (surprisingly) good results doing a double undercut on the trigger guard with a Dremel, and decided to remove the finger grooves as well. Everything is looking good, but when I started moving to finer and finer sandpaper to erase the scuffing, it became apparent that the front strap is not perfectly flat. You can still see two (albeit small) bumps where the finger grooves once were and I'm having a hell of a time with it. The gap between the trigger guard and the lip at the bottom is too small for me to get a typical sanding block in there, and I don't want to keep "trying" to smooth is out because eventually I'm going to run out of material. Any suggestions?