Yep, I'm building the old one. Now, I built one of these before...way back in 2004 I think. Maybe 2003? SO I recall the challenges. And somehow I did it with only the GHQ instructions.
I remember the "warmth," LOL. Especially at shows. It'd get downright hot.
As for headlights, I have several flush-mounted micr-mini LEDs with magnet wire and built-in resistors to use. I plan to o it that way versus some sort of fiber-optic connection to the Kato lightboard.