T-splines could be worth checking out in the future.

You are right about this model. But it is alot easier to create plans and drawings from a design created in moi compared to some smoothed poly mesh from maya. In moi I know the radius of my fillets. :)

By the way, i noticed that it is really convenient to import illustrator files. Is there any way to export curves back to .ai or .dwg?

/Oskar