Yes…it’s TRUE. I used a 3D printer to solve a problem I have had with my Celestron CGEM mount ever since I bought it. Because I am a retired Electrical Engineer I have always been focused on finding ways to improve my guiding. The first issue I focused on was Periodic Error Correction (PEC). My very old CGEM is of the vintage when Celestron used non-integer gearing in their mounts. This resulting in a periodic error that took multiple rotations of the worm gear to repeat. Specifically the periodic error…