These were early, pre-production engines so that I'd have something in my hands. The problem is that most Italian businesses shut down in August. So, they sent me a few quickly made engines before they came back to begin production.
Yes, the head button volume is much too much. That has been addressed. The crank will be threaded correctly. And, typical of engine manufacturers, they make performance claims that we know are not reasonable. This phenomenom has been explained to me as "Italy is Italy".
I plan to visit them in October concerning 67 and 80 size engines. Hopefully, everything keeps moving forward, but at a careful pace.
So far, I am happy with the relationship.
Al Hobbs