Thanks for the input fellas....I shoulda checked in for replies early
afternoon...cos I've just made one Marc, Doug, Pete and Trevor!
I made it adjustable so that it covers approx 52-57mm.
Locked with a recessed pair of grub screws that won't foul with
the 2" Drawtube. Thanks Dougie for the offer though mate

I will have to make a few of these separate distance spacers for any 2"
eyepieces I ever buy, not that I do much visual.
The only one I have is the GSO 32mm, might be interesting to try
the MPCC on that. I do remember my first view of Eta Car through that
when this mirror was brand new, and the coma was evident 7/8ths
out to the edge of the FOV.
Thanks Doug and Marc re the debayering....yep I just did RGB..that would
explain quite a bit

I'll sit down and read your tips guys and try and digest the method
you use. Who would have thought the OSC would be such a learning
curve when going from DSI II mono

. Not that I've been very successful
with that either
cheers guys.
Steve