[Richard]

Thanks to all for your inputs. I have been thinking about your comments.

I think Jon is on to something about wheelbase length. I do believe that the combination of wheelbase length which contributes to slow reaction to steering inputs, and the effect of sitting in front of the wheels which exaggerates the side to side movement leads me to the feeling of impreciseness in steering. Thanks Jon, these were factors that I didn't previously consider.

I do totally agree that air pressure and weighting of an axle change handling. However, the experience I had with the truck didn't really change the overall handling. I drove it empty, I drove it with a heavy load on the front axle when the load had my rollaways in the front of the truck, and I drove it with the rear axle heavily weighted when the last half of the truck was packed out. I weighed the truck on both loads so I have axle weight data to corroborate the loading. The best drive was with the front axle heavily loaded or the truck empty. When the rear axle was weighted more, the steering became slightly more twitchy, but the overall characteristics of the truck didn't change.

I also hadn't taken the aerodynamics into consideration. We are driving a barn door/sail and given the surface area of the sides, any slight change in the air pressure on either side of the coach is going to result in a side to side movement. I am just wondering out loud if the vortex generators installed at front and back would change that in any way.