Resolution is good, and the noise level is looking promising. You've already brought out some of those "galactic fountain" streaks that give 253 its unique character.
The colour needs adjusting - it's very purple at present. If you get it the galaxy largely colour neutral on average (ie no overall purple cast), then you can increase the saturation a bit and bring out differences between the core and the spiral arms, but if it's all purple, increasing the saturation only makes it yet more purple.
Be greatly encouraged. Should it ever stop raining, squeeze off more data. That would help make the background cleaner so as to reduce the temptation to clip the blacks, and you'd have a great picture.
Hope that helps.
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