Clockwork Coop Version 2: A Good Decision

Remember the decision to use two door switches on this post?  It turns out this was a good decision.  Things seemed to operate very well when everything was installed.  But I soon after I started using remote manual controls I got an error.  It seems the coupler holding the threaded rod onto the shaft of the stepper motor failed and the door fell into the closed position.  If I had used a single switch to detect the door state, I might not have noticed the error.  Instead, I went to investigate and quickly realized I needed an adhesive to secure the coupler to the stepper motor.  After a quick fix with some silicone caulk I was back in business.