Impressive model... One day...
As for the paper thickness I mostly use 160gr/m2 or 220gr/m2. Last for bigger models.
Never a big issue: who can fold exact at 0.07mm.
Papermodelling has a build-in correction bandwidth, this way.
I see a lot of 404...
And that is no surprise. This page belongs to Gerard Methorst.
The fine Dutch designer who due to piracy and losing Draftsight stopped working on paper models.
He also stopped updating this page and the links...
Sad but true.
Maybe you can explain and enlight some about the techniques and tools you used for this. Never done this, but think to kow how... But or the less experienced among us perhaps a big help.