I've looked through the forum and seen that the dual tank topic has been well discussed. For suspension reasons, I am exploring the idea of running dual underseat tanks on my pre 71 CJ5 tub. For safety reasons I will probably build an outter shell around each poly tank. I have a rear 15 gallon tank, but it isn't going to work out if I stretch the wheel base. Was wondering if there is a way to plump a fill system so that I don't have to run the jeep up both sides of a fill up island to fill each side. Thanks in advance!