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Thank you all for such kind comments. I am really glad I did not listen to my reason and set up that night :-)
Simon - I collected all three channels on the same hot, humid ,92% moon and partially cloudy night. Signal in OIII is very strong, so I would go for it as long as the skies are relatively clear. SII is weaker, so it would require twice as many subs as HA IMO. If (read:when) I was to do it again, I would expose OIII at about 1.5 times Ha, and SII 2xHa for this target., so about 1 : 1.5 : 2. Having said that, in this image all are 1:1:1.
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