I have a 2012 FXHO with a 16 gallon auxiliary fuel tank. Would really like to clean things up and get it in the hull by moving the battery to the front hatch and adjusting the exhaust emissions stuff a little and shoving it down there. Looks like a lot of vacant space down there. Has any one heard of building an inboard aux tank type of modification to 2012 or later FXHO? The closest I could find is Steve Friebe mod which I dont think gives me enough capacity. Here's what I have right now....Click image for larger version. 

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Want to get it off the deck.