I am attempting to build a computerized go-to telescope mount for my observatory that will carry about 100 lbs of imaging equipment with enough stability for astrophotography.  The plan is to use my lathe and shop equipment to make the gears and drive and my version of the On-Step telescope controller using stepper motors and a Teensy microcontroller.  The working parts of the mount is built and the controller and motor driver is up and working.  I have been testing it in the observatory (Sept 2023) and am working through issues.  At first the tracking error was very high (PEMpro reported 300 arc-seconds!).  I have since then carefully reworked the RA axis worm and worm gear to much finer tolerances and polish.  I will update this page as I make progress…….. or erase the page if it is a fail 🙂