Wait for another tank to add it all up.
Too bad you can't swap a hatch onto it. I guess it's on to the old kammback-on-a-sedan problem. I see you were thinking about mounting a boat tail on the hitch; have you considered doing this? The longer the hitch arm, the easier it will be. Maybe the bottom portion could be fixed to the rear bumper, while only the top/rear pivots.
