[McMurphy]

Just so I am understanding the engineering physics here...
The boards sit flush against the vertical wall of the truck bed when in the down position, then slide away from that wall 1-3 inches as the board is raised, then travels that distance back to the corner of said wall when it reaches the uppermost point of travel?
At that point your board is sitting at what; a 20* or 30* angle in the fully upright position?

If you answer yes to all (or even most) of these questions then I am sooooOOOOoooooo making these hinges !!

Sorry to steal yet another of your innovations dude....But you know....what if you, me and Bomp ever worked on a rig together???

Hmmmmmmmm