Thanks Gene in NE
Your equation makes sense. The carrier load is not far from the rear axle. The Cat III tongue weight allowance is adequate and since I intend to add only about 150 lbs to the 120 lbs of the unit, I dont anticipate any front end 'wigglies'. The Pleasureway Plateau tracks well and with 55 PSI up front, I do not experience any oversteering, even in moderate sidewinds. The Gearspace 34 looks huge but it sits snugly on the rear hitch assembly. GOod points re front end/rear end weight factors. The Gearspace 34 can be used to carry two bicycles and tie-downs are available, for the person who mentioned that particular need.
AL