twist on the ball trick.
One day, in ND when it was like something below zero, my wife got in the car, which was in the garage. When she heard the garage door stop opening she backed out and took out the garage door. For some unknown reason it had stopped before it was all the way open.
I had the ball hanging trick, but now I wanted a way to know if the door was all the way open without having to turn around. I got a couple of pulleys, and some string. I wound the string around the shaft for the garage door and thru the pulleys and to the ball so the ball was in the right spot when the door was all the way open. As the door closed it pulled the ball up out of the way.
Now, if the ball does not come down and hit the spot, we knew not to back out. And wouldn't you know it, the door never stopped llike that again. But my buddies and me did have a few beers over this so it was worth it.
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