Just a quick update I'd meant to post a few weeks ago...
On July 15, I ran the first test for character creation and skill checks! I also had a chance to teach players about a new XP system that I'm really excited about. It was a small group of four regular Saturday Night Space Opera players--each one a game master in their own right. All of them have at least toyed with game design--one is a published game designer--so it was a great group to solicit feedback from.
We tested three player classes: Starbuckler, Starbarian, and Astrosassin. Turns out I'd really underestimated player agency in level advancement so I'll continue to make adjustments in that regard.
I'm revising some combat mechanics and then (hopefully) finishing some rules for space magic. If I can get the basics squared away by Labor Day, I think I can move on to space-based encounters (starships, etc.).
Stay tuned for more!