I got a Pentax 67-ii that has developed a symptom that the film winder lever would get stuck intermittently. It usually can recover by itself after repeated attempt to wind without forcing it. It happens about once or twice for every roll of film I shot. It is driving me nuts. Because it is intermittent I am reluctant to send it out for repair. I have hoped that it would cure by itself over time. But it hasn't for about 5 years now. Does anyone have any experience with something like this? Is it likely a small repair?