Anssi, I don't have to export when bringing a model into SU. I am using ADT 2004, for some reason when you import into SU it would go all skiewampus (that is the technical term) Don't know where I found this work around, but here it goes, hope you can understand it.....
In ADT, set view to "top view"
switch to "front view"
back to "top view"
then click the "undo" arrow
then file, export to AutoCAD 2000
open SU import model and everything should be fine
don't forget the OPTIONS button for settings
Thanks for replying. I'll keep my ears out and let you know if I find anything.