I like your pump setup. I'm going to look into something like that. My gravity fill has a backflow check valve where it splices into the filler tube and the check valve sticks shut. Irritating!
I also have a 60 gallon tank than I have sitting on a frame so I can slide lumber under and I can get the tonneau rolled closed on mine. (pic) I would have thought you could go bigger than a 46.
2016 Coachmen Chaparral 390QSMB
2011 F350- CC, DRW, LB, PSD
2016 nights camped: 40