We have a 2011 Coachman Clipper with a powerlift system. The roof struggles to go up, causing the motor to overheat and the fuse to trip. We have greased the cable underneath, some kind of spring under each if the supports, waxed the supports with paraffin wax...nothing helps. We also replaced the fuse. Any other ideas? Our local repair shop is 4-6 weeks out on all repairs and we leave on a 14 day trip a week from Friday.