How did you pull thus off, that is acquiring the parts? I was told by the boutique in NYC that the only way was to send the watch to their service center in Houston. In other words, you could buy the parts but they would not ship them to you direct.p, only available in conjunction with a service to install them.
I have a gen CG on my 127 but snagged that from eBay.
Very cool....very jealous.