I just bought a 2017 North Trail 22FBS last week and while inspecting it I noticed the sealed bottom had a large bulging area between the axles. I took the previous owners word that the bulge is where the tanks are. I do agree the bulge does appear uniform and the covering is rigid and not damaged looking like water would cause. But I still have that nagging feeling that I should ask someone about it. If you own a similar TT can you please confirm if you have the "Bulge".