Sailcloth is definitely on our radar. We have purchased some for testing, but we were a little late in the preseason to actually perform any tests.
We have enjoyed the convenience of permanent bumpers with convertible colors. They can look a little tattered and can violate floor clearance rules if the Velcro isn't placed well. A particular difficulty for us has been recruiting a new adult with sewing skills and equipment to make bumper covers. I say "new" because the person who did it "last" year will inevitably not want to do it "this" year. It's a lot of work and difficult sewing. We want a bumper system that can be completely assembled by students.
As far as bumper retention goes, we have looked at latch solutions from 254 and 971. Many teams use fasteners of one type or another. The over-toggling clamps shown in the model seem robust and are easy to operate. We like the type with the clamp-lock for security. They are pricey, however. Look for removable bumpers (red and blue) from us in the future.
Of course, this assumes we will have bumpers this year. Who knows, maybe that's the "change" that's coming.
