Folks, I've planned to add a Polerouter to my collection for quite some time, and I may have a good opportunity to do so over the next few weeks. One question I'd like to throw out to those who have experience with these watches: How easy is it to track down parts? I poked around the internet a bit for replacement crystals, but didn't turn up much---has anyone found a good source for replacement crystals for the Polerouter? What about movement parts? I'd be grateful to hear from anyone who's replaced a part or two on their Polerouter. Thanks!