Hi gang, I do all my modeling (space ships, cars, buildings etc) in Carrara and running into problems joining parts that have been smoothed and had thickness added.  By looking at other folks works I can tell if perfect joining is possible.   I don't use any other program ( Hexagon, 3DS, Lightwave, Blender, or Wings);  so models made in those programs and imported into Carrara would not do me any good.  Plus I really need ideas. 

Thanks for any leads you can give me.  Jan