I already have two leaf shutter cameras that are very quiet - the Hexar and Yashica-A. They're not rangefinders, but they aren't the only tools for street photography. The Hexar is a wonderful street camera. I had some film from after the incident in the OP shot with the Hexar (HP5, Portra, Acros) and it's all come out fine. I'm really thinking my hand slipped and blocked the meter sensor on the front of the camera. I don't want to spend on a CLA unless I know that it will help. And so far I don't know for sure, it seems a bit like an isolated incident. But I'm leary of it occurring again (like it just did, but with a different camera this time).