3 things I'd check, from easy to more difficult:
- Oil volume on the lane. The ZC is a medium condition ball. When you played it on too much or long oil, or carrydown in later games, this will certainly affect its performance.
- Absorped oil - if in doubt, have an oil extraction at your pro shop or put the ball in a hot water bucket to sweat out some oil; the ball might need a new polish theerafter, but it should improve ball performance.
- PSA marker position. Check if the white marker is in your track area or beyond the thumb hole. On stronf mass bias core balls like the ZC, a PSA marker in the track area can - for some players, especially with a high track - screw up ball reaction, even cause negative flare.
I have a youth player at my club who "inherited" a 2nd hand ZC, and the PSA marker is just under the thumb (not in the track). His ball does not finish well at all - despite high revs, some balance hole corrections and drilling the holes deeper. Here, probably only a complete change in the drilling and some plugging will help?
Good luck!
--------------------
DizzyFugu - Reporting from Germany
Team X website & more about me
"Put some make-up on your face
Make this world a better place!"
Kahimi Karie, 'Good morning world'