Zip Dee fabric
To replace the Zip Dee fabric, one must be extremely careful of the alignment of the fabric on the roller tube.
If not exactly correct, the fabric will roll up towards the front or the rear of the roller tube when the awning is retracted back to the trailer.
If that happens, then the fasteners must be removed, and start all over again.
Be advised that if you do not want to take that risk, Zip Dee also has what is called a "CFR". That stands for the Cover, Fabric and Roller tube, all assembled.
That then permits a much easier installation, as it removes the risk of incorrect fabric installation.
Yes, it does cost more, but removes the risk of adding more holes to the fabric.