This is the last shot from last night. It is with the UV/IR nose piece but no MPCC. So my thoughts are it is a combination of the UV/IR glass and the MPCC. Multiweb had re-iterated about this in another QHY8 post, but I didn't fully understand.
His suggestion is to use no glass in the nose piece, space the MPCC as required and use a UV/IR filter in front of the MPCC or a bit further out if possible.
Stars in the last image aren't too bad towards the edge, I might run a few 10min exposures with out the coma corrector and see how they turn out. May not need it on the M110, but I may be back for experimentation when the WO reducer/flattener gets here, I'll play it by ear.
Thanks for your help!
