Sorted, mostly.
I'd like to shout out a BIG THUMBS DOWN
to Bresser.de for being the most pig headed, stubborn and self righteous pricks I've ever had to deal with.
The three online shops l contacted wanted to help but all recommended l go to Bresser.de and it all became to painful.
I have a Bintel Crayford style focuser enroute, and a
HUGE THUMBS UP
to Bintel and Don for the time on the phone, both of us with tape measures in hand and we're confident I'll be focusing properly once l have an adaptor made up.