Just picked up a nice 41 T-Craft. Problem is someone thought cutting a slit in the fabric to look into the rear of fuse was a smart thing to do. I think it was kids myself. But at any rate the unit is covered using Razorback materials. Anyone out there have experience repairing Razorback? Polyfiber should work but, I think Razotback used Butyrate dope as was used on cotton. Not sure how new fabric would work on this. Any help would be appricated.