Absolutely beautiful Mike - congrats!
Lovely banding on the globe and Tethys! what a bonus. Must find out how you do curves on just a portion of the image, I think my software can only apply across the whole image.
Re the high brightness for saturn, I've found that too that getting it up to around 200 on the brightness meter works well which is odd cos doing that for Mars would totally over expose the planet.
great stuff