We're building bumpers to fit the AM14U. Since it has no mounting points on the cross brace, we made our bumpers like so:
The latches between each bumper slide into one another to support the bumpers in the middle, where there's no support. The exposed wood at the end of each bumpers would be covered with fabric, but wouldn't have a pool noodle backing:
Does R21 mandate pool noodle everywhere? Is our current bumper setup legal?