Back in the late 90s there was great controversy over the length to wheelbase ratio. Ratios over 50% and preferably over 55% were considered safe. The wheelbase must be over 50% of the total length of the unit. Mfgrs started lengthening the wheelbase on most models to get over that magic figure. Another issue was the weight distribution front to rear. Before the controversy started the generators and fuel tanks on most Diesel pushers were mid chassis or further to the rear. On my 2004 HR Imperial the fuel tank 120gal, propane tank and the water tank, 100 gal is just behind the front axle. The generator is in front of the axle.