Martin,
I sure would like to see you guys and the other teams:
http://www.apfelbeck.nl/
http://www.pro-machining.com/
http://www.aircooledtechnology.com/vw.htm
get together and form a true international consortium group. All could share information, ideas and most importantly costs/rewards. This should make all concerns time lines much quicker. The different styles of heads, Jakes push rod 'Porkies', apfelbeck single ohc 3 valve, and your dohc 4 valve. I'm sure that each will have different costs/uses and the resulting benefits for all the VW aircooled community will be tremendous.
Just a thought. As Jake said over on his forum, a group working together can accomplish much more faster than individuals. I plan on posting this over on Jakes forum and Shoptalkforums and see what ideas and talk can be generated.
Kelly (Cohibra45)