Done really well there Justin
Details are fabulous, thus reckon your focus was pretty much Spot-On
If tho you suspect your focus is out, which I doubt bu much if any - I used to increase the exposure time by double or even triple & bump the gain upto 80-90%, slew around the planet and find one of the bigger moons, center it, and then reduce the ROI area by half, then center again & expanding the window as well, this gives a magnified view to focus with, get that moon as smaller dot as can
you may notice a couple of tiny spikes of to one side of moon, get them as short as possible or if can eradicate all together, than focus is near perfect as one could expect to get
Note: Keeping the moon in the center of chip, I believe you can select the area of the chip by drawing it with the mouse, hold & diagonal drag for rectangle/square,, for your RIO - it did with my program 'Fire-Capture' I think, free download ?
Doing this gives one a good evaluation of ones collimation
Hope this helps some ,,,,,,
But, as I say - You have done really well, very good, personally cant find any wrong with it, I'd be very happy with them !!!