I wonder if it could not be even better if a hitch receiver was installed on the rear bumper of the trailer so that when not in use and when traveling, the carrier AND the empty tank could transported there without taking up space in the tow vehicle. I know that most
fiberglass trailer bumpers are not strong enough to carry much of a load, but the carrier (55 lb) and the empty tank (10 lb?) probably would not be a problem. THOUGHTS about that???
Also, for those thinking of copying your idea, it would be helpful if you described how you hinged the carrier to the tow bar.