Hi David
Under no circumstances reduce the beam of the ECO 6. Boats are designed for the water and not the rodad. The boat needs the beam for its stability, with other worts for your safety. I know, that there are catamarans with beams which would fit the streed restriction of 8 feet. Look at the many acitents these boats had, special in Australia. It is reliativ easy to get from the road autorities a permanent, or at least a semi permanent permission to trailer the boat as is legally.?
Cheers
Bernd