I made this thing a couple years ago for long distance trips on VO, and its time to sell it. Its a custom made dual parts bin bolted to what was originally a motorcycle trailer, and between the parts bins is a 50 gallon boat tank.
the trailer is rated up to 800 lbs of stuff, and the idea was to load it up with VO, and have yourself a couple thousand miles of range towed behind you and refill your tank from the trailer on the road. I made several road trips without stopping for fuel at all, which was a real pleasure. The bins allow you to carry spare parts and tools, or camping equipment is what I used them for.
It has an extremely low tongue weight, under 50 lbs id estimate. The hitch is a 1-7/8 ball. Additionally, it also has a spare tire holder on the front for the car, as well as its own spare tire mounted on the side, as well as a nifty spring loaded stand for static storage. The whole thing is painted black, and the parts bins are lockable, BUT i haven't found the key for them anywhere, so the tumblers might have to be replaced. (the bins are unlocked)
This is a weird item, but well built and pretty useful for what it was intended for. Im looking to get 800 dollars for it. let me know if you have any questions
Some pics- A little dusty here, construction is aluminum, and the frame is steel. tank is plastic