Before posting this I did my searches on the internet to answer the question myself. But most of the threads date back a few years. This is 2025. I have 2 Nikon F bodies in excellent condition and both work. My new shutter tester shows the slow speeds to be excellent. But beginning at 1/60 I'm seeing a dropoff in speed that gets progressively worse as it goes up. Obviously CLA time. What do you suppose I should expect to pay and where to send it that's trustworthy? Thank you.