There's nothing overly complex about the Contax shutter. The same shutter is used in the Super Nettel and Nettax, and you don't read about those being fragile cameras.
Camera repair isn't that much different than other mechanical repairs. You really have to have an understanding of hand tools and be able to work fearlessly.
The guy with the two year wait isn't a magician. And when he passes from the scene, there will be others to fill the void. There already are. He simply is the most visible, although some of his claims are false, particularly the one regarding the Kiev shutter being found in most Contax II cameras.
Getting back to the Contax I, the early cameras are crude. I will go into detail later when I am using a proper computer and not an Android tablet.