Justin, the Full Spectrum Nikon is now my preferred camera for shooting clusters and nebula. It's way ahead of the unmodified Pentax K-x and even handles the heat better. I'm just waiting for a nice comet to put it to the test. Since comets are largely greenish I suspect the Pentax will be better as the inbuilt filter is of similar band pass to most comet spectra I've seen.
And I can just imagine would you could do with a modded camera, considering how good your unmodded pics are.
An amaizing amount of stars in there Kevin, the cluster is popping out real nice too, which I find not an easy task, so, great processing of a nice field and target, yep, top Image