I also had this problem and when I got around to examining it I noticed when I stood back and looked at both edges of the fabric while looking toward the Monty they were both curved pretty badly. Since the entire fabric was showing it's age (we are full timers and use it a LOT) I decided to install a new fabric. I went shopping on-line and found one on eBay from a place in Indiana for only $138 and ordered it with my fingers crossed. Was really surprised that it is of very good quality. My son and I installed it in about 2 hours and it works/looks GREAT and solved the problem of arms storing when retracted. I believe the quality is actually better than the original Dometic fabric. I used You Tube videos for installation instructions. Be SURE to pin the roller tube as instructed!
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2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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