I used the zip ties for a bit, and had a color code chart for our counts. The only issue we ran into with that method is that it got annoying to replace them on every retensioning. If we didn't remove the tie during reten, it would through the frame out of flat.
I am back to using solvent resistant labels on top of our mesh protectors, but those also have to be replaced periodically. Maybe I need to go back and look at that system. I suppose if the zip tie was a little loose it could be slipped down to the roller area during reten and it wouldn't be on the corner. But it still needs to be out of the way for the wrench.