Thanks guys.
Mike, maybe IIS needs an "extreme imaging forum" for loonies imaging equatorial objects below 30 degrees?
Rick, again, thanks for the PI tips - RangeSelection was off my radar until recently thanks to your prompting - good thought to wield it in anger on the halos.....
Paul, you're right about the flame, but just as well I didn't put up my first salmon pink Ha combine

. Might get more serious if/when more data becomes available. There are quite a few sensor pixel artefacts in the full frame that also need weeding out next time. I know where to go for a good reference pic in this area though - believe you've had some success imaging this field
Rod, Dunk and Marc - I salute you with the traditional AF morning greeting - also specially reserved for the 7am delivery truck driver