The bottom filler became brittle when heated, softened under hot water, and smelled like a candle in an old submarine.. anyway, that part isnt used on the prop so i chipped away as much as I could to view the circuit underneath. It's all on a brown plain fiberglass board, I'll take pics later.
Someone on reddit suggested the vent could be full of desiccant, to keep the inside condensation free, which can build up in thermal cycles?
The
next found part. It's a switch. I went through google and my photos for public ones, they're not great, so if anyone wants to, they can add better ones.
it's a switch found on the back wall of the Millennium Falcon Cockpit, on the arms of the window pre-production, etc. There are two around the "paddle" on the back wall, and three above the door, it's what Han clicks before punching the wall.
And on the Biceps of FX-7's arms. In between the arms.
Images of the switch to follow...