Here ya go...
Used two quarter inch by three stainless bolts to fasten through the tunnel. I used three inchers so that the end of the shank that stuck up through the rack was smooth. Cut the heads off of them obviously in order to slide the jugs over them.
Counter sink the bottom of the rail to fit over the nut on top of the tunnel, and install some sort of padding or rubber mat on the tunnel.
Use a washer and then mark where the cotter pins will hit the bolt, then remove the hardware and use a drill press to drill for your pins. I actually went like a 1/16 lower than my marks to keep them tight on rails. Use a nail set to get a flat spot on the bolts to start the drill press
All in all turned out pretty slick i think, the jugs stay tight on the rails and seperated that two inches where the fasteners are...had to trim the rails like a 1/16th or a lil more to get them to fit between the tunnel braces but other than that you just install and take apart about 15 times to get the right fit. The only thing that i might worry about is be supe careful picking where you mount the pins obviously you cant drill through the coolers...and there may be flex like a bow when the jugs are full of fuel because they are only fastened in the center...But like i said i like the looks.
