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. 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. The periodic error requires 3 rotations of the worm gear for the error to repeat. The PEC logic they installed in the CGEM assumed that the periodic error repeated for every rotation of the worm gear. My take on…