Stanley ST100 garage door opener- is there a way to reset the open/close distance? The chain broke on my garage door opener. I fixed it but after this the open and close travel was way off. I adjusted the close travel distance knob until it was at the minimum and this is about right. I have the open travel distance maxed out and the door still needs to open another 3 ft. Is there a way to reset this somehow or adjust it so that the door opens fully? I don't have a manual for this old opener.