Ditto, to be honest. My background is primarily in theming for PhpBB, Drupal, and Wordpress to an extent. Bookstack is entirely new to me, and the tactics it implements are surprisingly streamlined if, not what I’m specifically used to.
LCARS also presents unique challenges since practically everything can be done in CSS (which presumably makes it a perfect match for bookstack) but you kinda have to trick CSS into doing what you want with LCARS more creative aspects.
But, assuming we get approval, I’d enjoy collaborating. I’ve always done theming solo, so it’d be a new experience.