IMHO, the greatest camera failure of all time & space is the Kodak Retina Reflex. They almost invariably failed of their own volition, at a very young and tender age. Back in the day, I had visions of grandeur and Kodak was able to supply parts and manuals for them. I never was able to successfully repair one. The shutter is linked to the wind mechanism by a pair of concentric, spring-loaded shafts; all with issues of timing, pre-tension and an inherent fragility against which the front standard is assembled. (One slip and the shafts can be bent or the bearing hole deformed.) I admit that I am not temperamentally suited to precision work, but this is a camera that should have been great; great concept, great lens, great shutter.

Forgive? Nah! Not being a bean counter, I would not understand why they were unable or unwilling to get it right for the future. I still have a small stock of parts .....