Advice on direction

 From:  Billabong
11312.1 
I gave myself a personal project of trying to model the bubble ship from Oblivion. I'm having some trouble on the tail area and could use some advice. I drew out the outline as you can see. I tried first using a Loft, but it gets really wonky at the cross section area, so then I tried doing it with paneling and using the Network function, but even after attaching all of the panels through "join" and trying through Boolean "Union" I get a crease at each section. I know this is something that would be better done in Alias or Rhino, but I'm confident/hopeful I can get this done in MOI. Does anyone have any suggestions? Thanks so much for taking the time.
I have been modeling in 3Ds Max for over 18 years, but I want to do this in nurbs modeling.