The last crisis happened yesterday when I was reviewing shop drawings of structural elements made in AutoCAD and based on my 3D FormZ model. The delta was appr. Now that was something. I keep those in a swithched off layer and only use them to export to new file thus never touching the originals. They are not a part of my normal workflow.
Any suggestions welcome.
No advice - but . . . Interesting and frightening problem there. Wish I could help out. However, I must tell you that the work you've done on the building is wonderful, and the presentation is quite nice. Keep it up.