I tested sb_twinsuns on my test server. Far as I can tell it's not SB2 compatible, as all physics are disabled on the map (You leave the planet and there's gravity/air). Just a long fall to the bottom. And the map lags a tad too, although it could have been the fact I was running SB2 on it causing the lag. By default there's like 92 world props though, including scripted objects like garage doors, elevators, etc.
That aside, the maps nice looking. I didn't check every planet, as I'm headed out the door.
