I have used this mount twice. It appears to work well. it uses both 12vdc and 110 ac for the dual drives. It has 1.5"shafts, a hand control corrector, and some fine tuning capabilities on the control unit. It is quite old - probably 1950's or 1960's vintage. It has about 65lbs of counter weight with it. Asking $400 plus $100 for crating(I will build the crates) and shipping. Will also trade for other astro stuff - nice eyepieces, achromat ota, or? I have had it on consignment in a local shop but will be picking it up tonight. If you wish more or better pictures let me know.