vertical drill guide

Boost Meboost will be really apreciated !I printed and tried many beautiful and over complicated 3d models and jigs to make perfectly vertical holes with the drill but none satisfied me. I made this super simple guide and have been using it ever since when I can't use my drill press. I glued a small L-shaped aluminum profile to reduce wear, i recommend you to do the same and use a little lubricating oil to preserve drill bits and jig. I use this guide for precision work on guitars with very