I played Space Encounters! The better unit (we will call it 420) is working great. Controls are responding well, lights are flashing and strobing on cue, screen looks good.

Unit 419 does not have a working monitor. I have a working spare but the design of Space Encounter requires removal of the monitor frame. The tube is mounted on a wooden bracket and the chassis is mounted at an angle. 419 does not flash the marquee either. Strobing is fine, but the blinking marquee light is not blinking.