I am thinking of creating a complete DIY electric drop down screen, and masking.
That is quite impressive Mark, would you say that you have more power then you need with those motors?
Also how do you control where the motors stop. Do you have to do that manually or is there some type of sensor/switch to keep the masking from running too far?
As some screens are very light-weight, I don't believe alot of motor power would be needed. But being able to set break/stop points would be nice.
I have a bit of engineering and electronics background, but have done very little with motors.
Also the tensioning part of a drop down screen adds some complexity.
Motors are readily available in many local wrecking yards where you can go out and pull it yourself.