As far as fabric goes, they should have used fabric with Twaron. We received some years ago from a sponsor and we did use it for bumpers. Mind you, it dulled our tin snips cutting it but it's really puncture proof. More here:
http://www.warwickmills.com/Twaron.aspx
And for all of you who have a whole day at your next regional for the unbagging and flap mitigation time, you're ahead of us. We're going to our second district event which starts on Friday evening. And because we've been on top of things, not really expecting FIRST to give us a new design challenge, we have only two hours left of our unbagging time. We will have the practice and set-up time on Friday evening (5-10 pm), but we'd been really intent on using it for practice matches.
Life is never dull!