That is a seriously impressive effort Nathan! Shows you how mastery of your equipment easily beats simply 'owning' better equipment.
If I'm nitpicking (and I mean *really* nitpicking!) I'm wondering if there could be a little bit more detail in the galaxy (noise reduction seems to be a tad harsh) and I'm also noticing star cores aren't completely white, but gray. The latter can often be seen as a side effect of PI's wavelet routines (if you used them) and can be easily fixed with masking the non-treated cores back in. Awesome stuff and definitely worthy of the deep space section of any forum!
