I have a long wheelbase f 350 crew cab with a 49" by 9' bed. I have been considering something along the same lines for my X. Would you mind sharing your material list, at least tubing side and angle size? did you bolt it to the floor of the truck? any flex on the ramps while loading? how are you going to tie it down?
And the most important question, how does it drive with the unit loaded, especially in the wind.