If you know your manufacturer, Dometic, Carefree, etc, maybe give their customer service a call.
If no help here or from customer service, maybe try an average # of what your seeing?
I need to replace my awning, a dometic, and know I need to count the turns to unwind for rewinding but I can see what would happen if that process failed.
You dont want to overly wind it but on the other hand under winding is going to force you to uninstall and add another turn (from what I understand).
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