I’ve owned an SKX-173 for nearly three years now. From what I’ve read, Seiko recommends sending the watch in every couple of years or so for routine maintenance (lubricating the gears and replacing gaskets), but I’m sort of thinking that I could probably hold off on that for at least another two years. I do wear the watch while swimming and snorkeling, but I’m not a diver. Also, I’ll switch it out with my G-Shock from time to time, so the watch isn’t a “beater” by any stretch of the imagination. Given that I haven’t really subjected the watch to any torture, should I still go ahead and send it into COSERV for routine maintenance? Thanks in advance for any input.