Rear trunk mounting
 

I have mounted a trunk on the car behind the spare tire using the heavy duty brackets from Snyders. My trunk weighs 98 lbs filled plus the weight of the mounting platform. I am conserned about the long term durability of the mounting and bumper structure. I don't think the bumpers were ever designed to carry such a load.
Has anyone had a problem with the mounting system for their trunks?
Bill G