I am a rank amateur at best when it comes to leather work. I’m starting to get better. Straighter lines, smoother edges, tighter fit. All those things are going fairly well. Where I am getting my behind kicked is lining up the holes through the front, welt, and back. My normal MO is to get the pieces glued together, evened up and the groove and mark the top. Then I go to the drill press, and here’s where things get country. I’ve used drill bits, reamer, awl punches, finishing nails. Coated with wax, uncoated. It doesn’t matter. I get a giant burr sticking out the back of the sheath, and when I go to try and groove the same line it all goes south. Connecting the dots isn’t leaving a very clean line. Any tips or tricks for a guy ready to pull his hair out??