Hi madmanmoon, probably Construct / Revolve / Rail revolve would be the easiest way to build that.

Check out this previous post for an example:
http://moi3d.com/forum/index.php?webtag=MOI&msg=249.4

I've attached an example model - to produce the shape, you select the vertical profile curve, run Construct / Revolve / Rail revolve, then pick the bottom outline as the rail, then the revolve axis is from the end of the first profile downwards.

That basically revolves that profile but squishes it to conform to that bottom outline.

- Michael