I've had many kind offers from James & Bert,..I feel like from a pauper to an embarrassment of riches!
Thanks gents I'll definitely seek help...if & when my lens cell returns.
A big thanks to all.
edit:
I also saw a gent at
CN post (post #3987593 ) that he uses a TV .8x reducer/flattener. His post, literally minutes before mine (here), was impeccable timing! I've asked him a few questions as well.
edit 2:
I asked Explore Scientific and they said they have one in the mill but some time off yet. ES said they have been told the TV or Astrotech reducers work but have not tried them themselves.