""""""""""" but also the edges between different pieces are not exactly aligned with one another, some of them have different endpoints although not very far away.""""""""""""""

Thanks for looking at that Michael. I thought I inspected those endpoints of edges and didnt see any. I need more practice!

Anyway, it seems that with this, and Anis's model, it's not really what I was looking for, but more construction issues, or the export didnt handle the solid creation well. "STEP" up to solids :o

Thanks again.