[johnr]

So the gdc probably isn't going to come out with a minimum requirement for bumper backing. So i say leave it up to the teams to decide how to protect their robot,but have a test at inspection. Maybe a 120 pound weight with a six inch bumper on it. Pull it back(to a set distance) and let it fly. If your bot 's bumper survives your good to go. If not ,at least your in the pits.