I have an earlier head and foolishly assumed they would be quite similar inside (they usually are). Looking at the manual on the Meopta site they look very different. I think maybe a PM to Ole would be useful as he might have access to the version you have.

This thread I posted just before I got mine might also provide a few names here that may be worth dropping a PM to APUG Meopta Thread. Sorry I've not been a lot of use on this one

Good luck with your search, they really are worth having.