Hello again,
If you are interested in buying these plans, there is a place in the USA that sells them. I think they are identical to the ones from VTH (and are still in German), but at least you can order in English (and they are already in the US)...
The site is:
http://www.sssmodels.com/
You'll need to go to the 'books, drawings, videos' link and then to the 'engineering drawings' link and scroll down a bit. They're $9.75 from there.
I hope this helps
Warren