So, I now have a third 519, purchased for the accessories it came with, which I intend to sell on, but it has a couple of problems I'd like to address beforehand. I'm hoping someone here can give me some pointers on how to disassemble the necessary parts. One issue is a sticky shutter. I've been exercising it a lot, and it now works most of the time, but not all the time. I tried using the bottle-cap-and-rubber-sheet trick to remove the front element, but I couldn't budge it. Maybe that approach doesn't work with these cameras. I don't know. But, I used more force than was needed to remove the lens on the Konica S II, and no go. So, I'm looking for suggestions. I'd also like to remove the top cap, so I can clean the viewfinder. The rangefinder patch is barely visible, so it's difficult to focus on most subjects. It seemed like it would be an easy one, with just a few screws and not much else on it, but it's not cooperating. I even removed the flash/accessory shoe, but that doesn't seem to be the issue. Something at the left end, when holding it for shooting, with the shutter button on the right end, is holding fast and refusing to let go. But, I don't see anything on the outside at that location, so it may just be stuck. I don't want to force it without knowing more about what I'm doing. I'm actually attempting my first disassembly on a 500 that was also purchased for its accessories, with the intention of treating the camera itself as a catch-and-release. But it, too, could use a viewfinder cleaning and they sell for much less, so it gets to be the guinea pig. If I can figure it out, then I'll move on to the 519.