Oh, thank OK Hoff -- he's the one who put in long hours deciphering how it all works and then figuring out how to explain it to the rest of us.

I do have a paper nering completion on how painlessly to build and export models from Sketchup for use in SH3D. I can guarantee what it lacks in brilliance it will more than make up for in sheer throw-weight -- somehow, during these last few years of underemployment, I've forgotten how to edit myself. [:(]