So after watching Beo-wulf's sheath making videos (which I totally recommend to anyone thinking about getting into leather work) I decided to make a sheath for my shiv. Its not my first but its the first I'm really pleased with. And on to the question. I used a overstitch wheel and groover and the stitching come out clean on the front. However the back has a bit of a Frankenstein look to it. Any tips on getting the holes punched straight, or is this just something that takes practice?