bigdog: it is 4 nuts to take the tent off of the rack... Should only take a few minutes, but a second person is a necessity for lifting it off.
RakkasanFA: I probably wont be making any more... I am into it less than $100, but that three days of labor is the expensive part.
articulate: They are aluminum. I wanted to keep the weight down, and not have to worry about corrosion as much. Toolbox access is not as easy as before, but I can get my recovery bag (biggest resident) out with little fuss. I may drop the fuel cans horizontal, and lower with a fabricated bracket. I mounted them as is because it was the easiest at the time.
mcm4090: it keeps a lot of the bed space usable while keeping a majority of the tent out of the wind stream. It is a compromise, but one I wanted overall. If you put it on a convential rack, you get a high CG and a good 1-2mpg hit, but retain bedspace. Down low is good, but I didnt want to loose a big chunk of cargo space. I may close off the racks with sheet aluminium to make some secure/ weather resistant storage.
Thanks for the comments,
Eric