This motor and controller were used on a JMI NGF-S focuser are in excellent working order. There is a small split in the plastic motor cover which is covered with black electrical tape. I have had two of these focusers and the moter cover split on both of them when they were used in cold weather. I am selling this one because it has been replaced with a RoboFocus unit. I am not sure what it is worth so make me an offer.