After 32 years of use the Zipper on my wall tent failed. The timing sucked because we had negative temps and high winds. We did a caveman stitch with paracord and made it work but now I'm going to have to fix it. I've been thinking of ways to install a 30" thin plywood door that the frame attaches to the canvas with Velcro and some bolts. I have a few ideas that I think will work. Going in and out of the tent using the zipper has always been a real pia and a new zipper could fail at anytime. Anyone out there done anything besides a zippered entryway?