Has anyone here sent their GS back to Japan for service before? Curious about your experience. Or of anyone has sent back the the US service center (which I believe is just a Seiko service center). Im looking to find out the best way to go for a full service. Send it to Japan for service and touch up of the zaratsu finish, send it to the Seiko service center in New Jersey, or have a local watchmaker do it. Any suggestions?