[Al Skierkiewicz]

Drate,
To be sure, your bumper is not moving during the kick? It does appear from your drawing that the bumper pulls back. Bumpers and frame may not move. I would advise you to draw this idea out and check the cross sectional radius of the tubes and the limits of the bumper zone (between 1" and 7" above the floor) before deciding this concept has merit. Then prototype with actual field pieces before you commit.