I'm going to take a wild guess and say that I'm not the first person to think of this, but I couldn't find it searching around. What are your thoughts about taking a truck with two 20 gal side tanks and mounting a suburban center tank for a total of three tanks. I wonder if there was a way to do it. Maybe run two valves; one for the left and right tank selector and the second for say the right and rear tank. So, to use the rear tank, you'd have to have the left-right selector in right and the right-rear tank in rear. Who knows, maybe you could integrate a three position switch for left-center-right tanks. Maybe even grafting in the second fuel door on the bedside. Any thoughts (besides the heart attack one might have when filling up, if not from standing at the pumps too long breathing the vapors, then when you see how much 80 gallons of gas costs at one time)?