E-W's Juice Box: Page 11 
To keep the gas tank in place, I built two oak braces to hold the fuel drum steady.
This is the fuel filler pipe. The chain is there so I don't loose the gas cap.
The trailer wasn't sitting level when it was hooked to the jeep, so I added a 1" x 1" steel box tube spacer between the trailer bed frame and the towing A-frame. That leveled up the trailer box very nicely.
