JMI Motofocus for the Celstron Nexstar 11 GPS (model MFNEX11) with with added Digital Focus Counter (model DFCMF) for improved focusing accuracy and repeatability ($75 upgrade).
"MOTOFOCUS is an electric focus motor for precise, vibration-free focusing without the need to touch the telescope. It is great for visual and photographic use and features variable speed for coarse and fine adjustment. Precise positioning is accomplished through electronic braking. Mounting is easy with no drilling or tapping."
4 months old and as good as new, used only a few times. With mounting instructions.
New over $200, here $140. Including shipping in CONUS. Selling because I originally wanted something touch-free for astrophotography but have since decided to stay visual for the time being.