Hi Gary
I gave this a go tonight from Brisbane, whilst trying out my new toys, a WO 50mm F4 Guider/ASI290MM combo on the Tak Mewlon 210 F11.5 with x0.8 RF, to give me a focal length of 1932mm.
ASI 1600 MM Pro, L:R:G:B, 60:15:15:15 minutes. It sure is a faint PN and I didn't manage to harvest much detail from my back yard with the Brisbane light pollution.
But at least I managed to (mostly) guide a 1932mm fl 'scope with a 200mm fl guide scope.
Cheers
Dennis
Added versions processed in PI (originals processed in CCDStack). Bit rusty, need more practice.