surfacing

Check out projected curve with a sketch onto sketch option. You will need to cut your model up some.

From help: "You can project a sketched curve onto a model face to create a 3D curve. You can also create a 3D curve that represents the intersection of two extruded surfaces generated by creating sketches on two intersecting planes."

Once you have the curves I would suggest constructing the model with multiple boundary surfaces. You might want to start with a simpler model to learn surfacing with though.

I hope this helps.

Rob Stupplebeen

Sounds like you have a lot of work ahead of you. I suggest this book to help you learn surfacing: http://www.dezignstuff.com/blog/?page_id=75

can almost do in solids...but we need a side veiw and section view to know what you want the center to look like.