New late last year. Belt drive in altitude. Az drive includes slip clutch. Tracked well and everything is in perfect working order. Includes operating and installation instructions. But... It was custom installed on my scope so it almost certainly will require new bracketry and an altitude drive bearing disk(for the belt.) I expect the Tech2000 folks could fix you up or fairly simple fabrication yourself. New cost $649. My price $275 firm including shipping CONUS. Money order preferred. Would consider trade for Nagler 13mm type 6 or 19mm Panoptic eyepieces in excellent condition, with a little cash adjustment as necessary. Please note my Astromart rating. Thanks for looking.