Just adjust the tap on resistor R3 to slow the door down in the close only, there are two taps on r3 one for open and one for close basic speed.this would be one way to lower the speed, and possibly the torque you would have to measure the torque when both of the slow down switches are open. If you cant get the torque lower this way then Look on the door print you will see a jumper from terminal DA2 to A if this jumper is in place then you can adjust the band on the slowdown resistor to adjust torque, although you may have to adjust the entire close section of the door after adjusting this band.
