Thanks for posting SmallFry. I thought this thread was long dead.
I sort of gave up on it when I saw what NASA did decades ago.
They did some aero studies on big rigs and simply used this ingenious ( but common sense ) idea :
hinged gap fillers.
I do wonder how that this sort of setup would work in a jacknife type turn though.
Would it flex enough ?
I like your idea, but can't really visualize it. Can you do a quick sketch ?
( And P.S. - nice sleek looking rig you drive )