Hi folks -- One of my favorite cameras is a Mamiya C3 I've had since last winter. It functions quite well, but there's a few things about it I'd like to improve if possible. Foremost, the film advance crank is missing; the round plate on the camera's side only has the metal nub with a hole through it. To advance the film I turn the plate/nub, which works well enough for now, but I'd like a replacement crank. If someone out there in APUG-land has a replacement or an extra, I'd be very thankful and would gratefully pay for it plus shipping as necessary. Less importantly, the Lock/Unlock knob is somehow broken; it wobbles back and forth rather freely. I don't use it at all, so I'm not sure it's worth getting professionally repaired. Also, the focus mechanism isn't working quite correctly. I can't focus to infinity, only to 3 ft/65mm or 5 ft/80mm on the scale before the focusing mechanism stops abruptly. Any helpful hints or tips would be appreciated. I love this TLR and want to get it back operating as well as possible.