Since my 6.4L sucks fuel like a funnel, I want to add some distance between fuel stops. One way is a replacement fuel tank or an auxiliary tank. For those who've done this: 1. Any brands you prefer or stay away from? 2. If I get a replacement tank, I want as big as I can get. I see some brands in the 60+ gallon range. Any comments, for or against? 3. Is there any reasonable way to make an additional tank in the bed easily removable? In other words, if I need the whole bed of the truck for something, can I just unplug a hose and loosen some bolts and pull the tank out? I have an '09 F350 SRW crew cab long-bed.