Hey Folks! I did a bit of work over the weekend, and the reactor is now fully operational. Or, at least, looks convincing enough for video.
All of the readings you see in today's screenshot are approximately realistic for "ignition" mode. 6 partially charged batteries are linked to the reactor and UI via the PWR BUS knob, where they can power the indicators and various pumps/regulators. Once the chamber was evacuated, capacitor charged, and all systems ready, the IGNITION switch fired the lasers at the target pellet, initiating fusion.