Thank you Andy, Lewis, Marc and Ben.
@Ben - Yes, the OIII is most prominent around the central white dwarf and with some streamers/spikes streaming out.
@Marc - Thank you Marc for your kind feedback. Perhaps I was expecting too much of an improvement in the data with extra 50 hrs.
@Lewis - Nobody is doing any

over here

, but more seriously, I was really expecting a more noticeable improvement.
@Andy - we shall unleash the artist within with the coloured version then

