Quote:
Originally Posted by Conquistador
because they lifted it while it was doing its thing opening, thus forcing the mechanics to run faster as usual. 
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I am no expert but I suspect this has caused the problem? hopefully someone who knows more about how they work will be along soon with more helpful suggestion, does it run on some sort of gearing? maybe lifting has caused one side to jump a few teeth, sorry this is all guess work, hope you get it fixed