Good to know f300s are not unrepairable. I have one and am looking at another. I love them, but do worry that once they have something go wrong with them, that's it. I also worry that the movements have a finite life unlike mechanical watches which can, to a large degree, be kept on the road by good watchmakers. With tuning fork watches the number of competent people to maintain them is limited and, if some obscure part fails, I worry that there's nothing that can be done.