rwingnut
Observer
How did you determine the tongue length? I've found a lot of varying information as to optimal tongue length, ranging from match the wheel base of the tow rig to make it long enough so that you can jackknife your rig without damage.
I made a spreadsheet to work out weight distribution to get 10-15% tongue weight, with the constraint that I had to be able to open the FJ's big swing door without hitting the trailer. I then tried to balance how much I could jack knife the trailer while keeping the trailer as short as I could. I can't get a complete 90 degrees, closer to 80 deg. Can definitely reach a point of diminishing returns (i.e. trailer gets longer but only gain 1 deg). I think I ended up with a distance of 45" between the ball and the front of the storage box of the trailer. That will leave about 8" between the open FJ door and the front of the trailer.