The measured finesse for the new PMC is ~ 300. The previous calculation was wrong because of the wrong calibration.
Finesse measurement revisited: I rechecked the Finesse measurement and found that I got the same result, so I realized that the calibration might be wrong. So here is the explanation
PZT range revisited: I mentioned in the previous entry that I can find several (4-5) TEM00 within 0-100 V applied to the PZT. This number should be wrong because we can expect only ~ 6 resonance over 200 V (3 um), or ~ 3 resonance over 100 V. It turned out that what I saw was not real TEM 00, but something else that made me think I saw some hysteresis.
To Do Next: Anyway, the PMC/PZT are good. We will try to lock it tomorrow.