Mike Stewart
Restoring and preserving historic spaceflight hardware — Apollo Guidance Computers and beyond.
Mike Stewart restores and preserves historic spaceflight hardware and software: testing a scrapped Apollo Guidance Computer module, powering up a Lunar Module thrust meter, Apollo command-module talkback switching and translational hand-controller teardowns. If CuriousMarc is the flagship of this niche, Mike Stewart is its most careful technician — 245K subscribers, uploads every few months (last one about three months ago).