<p>Do not listen to SP. He is a highly skillful mechanical engineer with years of experience. What is easy for him is not easy for most of people around. If you have never repair Z-4 before and you do not want to sacrifice the camera just find someone who can. There are bunch of people who can fix Z-4 for reasonable price even in the USA. I think that Clarence Gass can. Just google him and ask. He claims that he can do any camera. Did Canon 7s for me. </p>