Good going Mark.
The image shows a fair bit of compression artefacts, however the detail is good... Colour wise, its a little desaturated.. I have the exact opposite problem processing on my laptop, colours look bland on my laptop, so I tend to boost them heaps to get them looking right, then when viewed on my desktop they are oversaturated to high hell, and the image is always horribly over stretched..
The data looks great though, I would definitely have another go at this on your desktop mate!
Oh, the diffraction spikes.. well.. You have a really nice refractor, capable of images with brilliant, round stars.. don't ruin that with diffraction spikes
(Personal Preference... )