I use these to carry both my expedition and my spirit x. Best carry method I have ever tried! [It's not failure if you learn something from it]
I'm game to being on board as a backup.
It is an interesting concept, but a little too expensive for some sown elastic band. I found a roll of a similar material on amazon for $12. Should be enough material to make 50 of various sizes, and the wifey said she will give it a shot sewing them. Will report back once we have one made.
I think it will be tricky to get them out but I want a want to know if it works when you have tried it. I don't have any to test for you unfortunately..