That's OK....it wasn't so much the advice as it was just playing around with the finished product to see what I could get. Like you said, the best way to repro this would be to do it from scratch with the .fits files
Have another go at Cen A, but this time make your subs 15-20 secs long, and give yourself a bit more luminance as well. Try unsharped masking to bring out the detail.
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