My final step was to make the roller tube's diameter a little larger in the front than in the back. I had some foam board laying around so a slid a small piece (6" x 1/2" x 1/8") under the awning at the front end of the tube. That took care of the rest of the gap. It kind of surprised me that 1/8" was enough, but it gets multiplied with each rotation of the awning on the tube.
JJ
I had a similar problem when I replaced the awning fabric on our Fiamma. The proper replacement wasnt available, so i just ordered a 13' 'universal' off amazon and trimmed the rear edge. Figured i would keep the pretty seam up front.
Nope.

The seam on just one side added so much circumference that the awning barely made it half way and really crooked.

Trimmed off the front seam , all was well. At least both ends matched.

Ended up being a good $99 repair, still looking good going on 2 years later.
Regarding the centering screws - if having the awning off center can cause it to roll up unevenly, I wonder if you can offset it slightly as an adjustment.

I am hoping to replace the Fiamma with a 14' roll up in the next few weeks, hurricanes permitting.

Might try a few adjustments on the centering of the fabric, and see how it affects operation. See if it can make up for the installer errors..
