I have always thought it would be cool to have a KJ Liberty gas tank as an auxiliary tank on the KK in place of the spare tire, thus having about 40 total gallons of fuel. The spare could go on the tailgate via a receiver hitch tire carrier or on a swing-out attached to a custom steel bumper. One can dream.I would love to figure out a (set of ?) auxiliary fuel tank(s) under the jeep. would be awesome to have for either extended range or for transporting race fuel for the car when I go to the track.