On the webcast I only noticed teams benefitting from bumpers. I saw some of them stay upright due mostly inpart to their bumpers. Sure, it will make it a bit harder to get up the ramp, but move the bumper up on the frame by a 1/2-3/4 inch and you will be good. (I would guess) Plus, they help keep your frame a little bit more beautiful for the pit and off-season demos.
