i have yet to build mine as i have yet to get barn doors, (soon).
when i do mine i am planing to have the pivot far to the left and away from the truck a bit,
so that when it pivots it will run along the side as much as posibull.
and as for the roof rack storage, i have an i dea to make it much easyer to get the tire up/down.
iff yo made a small rack for the tire to bolt to that was hinged to the rack at the rear portion ot the truck and would hinged down towards the rear, you sit the tire in it and then flip it up on to the roof where it would be sitting ontop of the tire.
it could bee locked from the hinge and you cold even add little shock obsorber from a newer hood or van hatch to make it smother.
let me see it i can draw it.
brb.
dave