I have an encoder. Not sure if it’s the big one or small one. I think this is an older Tac 20. Very Early 2000s. Has pump motor under tank . I gave vertical express job number and picture of the door motor. They gave me confirm for part number 9841775. Optical sensor and door motor. 529$ each. I don’t have the UIT. I should get one anyway. There was a flood in the building 2 years ago and tyssen replaced all the boards in shaftway. I hope they didn’t upgrade and vertical express has no clue