Nikonos V repair

I took my Nikonos V apart to grease all those O-rings that are not serviceable, because one of them had leaked. Almost 15 years ago this forced me to buy a digital camera with UW housing, but the quality of that low-megapixel camera was garbage compared to 35-mm film. Later I got a GoPro, an improvement, but the old 35-mm photos are still the best. I gave up on this repair back in the days due to not having a component drawing, but now that I found one, the job was rather easy. I put vinegar on those stuck stainless steel screws, not knowing what exactly was holding it, but I figured it could be either rust, salt, or calcium deposits, and that technical vinegar would dissolve either. It worked, except the screw held by galvanic corrosion.