>>10753612This is the inside of the torso of the RG Wing Zero Custom. The power gem is placed over the circular peg on the bottom and the upper chestpiece slots into the bottom hole. Seems pretty easy to drill a hole and wire an LED through the power gem peg, and put an inductor into that huge-ass cavity. I could also probably run a couple wires out from that same inductor and up the neck (pretend that they're exposed power cables) to a pair of miniature LEDs behind the eyes, though I'd likely have to print a custom piece for that one since cutting into the existing one looks a bit dicey.
Certainly that cavity is too small for a battery, but I've seen inductors that could probably fit into it. A circuit board on top of that feels impractical.