Today I stumbled upon a youtube channel with exceptionally thorough and witty how-to videos concerning the repair of Leica M cameras and Leica M lenses by one mikeno62. I wouldn't try to do any repairs myself but enjoy gaining some insight into the inner workings of my gear, so here goes:
M Cameras (Playlist with 13 videos):
M Lenses (Playlist with 14 videos):
I'm in no way affiliated with the channel. Moderators, feel free to relocate this thread to any more suitable topic.