There are a few options that I would like to point you to:
1. Reversible Bumpers (
http://www.chiefdelphi.com/media/papers/2437?)
-This is the method that our team used this year, and it turned out to be a huge success. My only word of advice is to make sure that your velcro mounts are secured firmly on (we ended up stapling the velcro to the fabric.
2. Quick Release Pins
-This has also worked very well for some teams, and something that our team is going to prototype within the next few weeks.
3. Latches
-This seems like a very innovative idea. I was talking to a mentor of Team 254, however, and he said that this tended to get annoying for the team to use. However, this is a great idea nonetheless to get your ideas flowing. You can find a picture of it here:
http://2013.team254.com/wp-content/u...fire-small.jpg
Also, check out their team's website for other ideas.