Hello Titleist!

I have a set of used 690mb's I'm working on to give a try. The PW, 9 and 7 have the most groove wear with the lowest groove on the PW about gone. I know this indicates face wear also. I'm working the grooves but need a little info. Worked on the Space Shuttle as a Refurbishment Engineer, so I have some knowledge about what I'm asking.

1. V groove or U groove. Have a tool for both.
2. What is/are the groove depth(s) on the PW?
3. Was the lowest groove less deep than the other grooves?
4. Was there white paint fill in the grooves?
5. Do you sell any replacement heads for these?