Mine is mounted to the solid metal part of the body
no chance of that area getting messed up
but would like to see how he did his rubber bumper
Where mine actually hits the door now, had a rubber bumper
but it was too small and the spring sometimes would hang up on it.
My other option is to put install a taller, larger diameter rubber
bumper on the door and I think that would be fine too.
Lets see what yours looks like .