Haven't serviced a 16S, S/B, M or BL in over eight years. For a thorough CLA, back in the 2000's, it was near $1000. And as Dom mentioned, we stripped the movement down completely (his image shows some bearings still installed, all of those came out and went into the ultrasonic cleaner). Then we would rebuild them exactly as they had at the factory. The thing with those cameras is that each one was hand made, so each camera was rebuilt "hand made" with multiple adjustment points along the way. Very time consuming. But when the camera was completely rebuilt, it would "sing". For about four years, then you had to redo everything again. That's one of the drawbacks of "wet" cameras.