Thanks. I will rep[ort back on how it goes with the motor. I've done a lot of step by step wood working and drag racing type things so the step by step pictures and descriptions are kinda in my blood. I enjoy doing it.
It is amazingly tight on the screw. I'm not married to it. The hairpin came with the add a motor and the instructions say that it's necessary to ensure that the motor isn't damaged if the door is frozen or blocked in some way. Not sure if I'll leave it or not. I have the door operating now in...
I built mine. I didn't want to use any wood so I made the tracks out of some left over HDPE plastic sheet and the door is made from some left over aluminum tread plate. I cut saw kerfs in the HDPE side rails on my table saw.
Door has a HDPE stop on the top to help seal it and a wooden knob...