Anthony ....2 subs....well done...looking forward to some more action from you with this camera with keen eyes.
What temp does it run down to?...Noise wise looks very clean, good detail and colour! The only thing is 300s subs start to bloat stars and washout star saturation colour ...it's just the nature of longer subs.
I suspect you might be able to get away with 240s subs (or less) ...stack lots for a good SNR and be just as good as 300s.
But I repeat only 2 subs @300s...pretty good Indeed!