I ran the single strap in my SN for a while and yes I completely understand how fast you can suck that tank dry but I never had it move on me...or at least not enough to make any difference. I ran turf under the tank in my last hull though. Maybe I need to do that in this one. I'm really looking into the possibility of building a custom tank. I've toyed with a few designs but so far all the conformal tanks that I've designed don't offer enough fuel to justify the trouble so if I build one, it'll probably just be something simple that will fit where a normal tank goes, only bigger.