Digital Setting Circles for a Dob Mount.
Upgrade your telescope to computer tracking (Digital Setting Circles) I sold my scope, but I still have the tracking system.
Celestron Advance Astromaster with 10,000 celestial object database
Converter cable to pickup Astromaster tracking and convert it to your Windows based PC
The Sky Astronomy Software program (Version 2.11 Level -III)– which provides an extensive star atlas and the capability to monitor the position your scope is pointing to in the heavens on your PC.
4000 tick optical encoders and the hardware for a dobsonian installation. $225.00 plus shipping.
I accept PayPal.