The Nikon FA is over twenty years old, and like all cameras of that vintage very few have ever been serviced since they were manufactured we don't expect our cars to work for that length of time without any attention but we do our cameras, my engineering training tells me anything mechanical won't work forever without lubrication and adjustment yet many people expect them to, if we want to use the older cameras as serious photographic tools and to be reliable IMO we need to have them CLA'd occasionally.