Hi guys, I've got a ford ranger with a plastic load liner in the back. Currently have 3 sheets of ply to act as greedy boards if I need to carry chip, but doesn't look very professional. I want to build an aluminium box, but at same time want to be able to remove it and keep the load liner for logs etc. anyone done anything similar? How would you fix the frame through the load liner to the truck?   Cheers