I have a couple of questions regarding registration numbers on Titleist clubs.
1. Are the numbers specific to the club or to me? This year, I cycled through all the clubs in my bag -- replaced irons, 910H, 910Fd, and 910D3. All were fitted by a certified Titleist fitter, but I have four separate registration numbers for my various shafts and such. Should I have provided my first registration number when getting fit for each new club, so the settings could be combined? I guess it doesn't matter. Just wondering.
2. Given that things sometimes change over time, can the specs be changed? For example, I'm experimenting with different grip sizes. Now that I'm pretty well settled, I want to make some updates.