I checked the TFs measured in air. They look healthy. There were some differences from the reference.

1. IP: L-T-Y coupling was changed. S/N of the measurement was improved at high frequencies.
2. GAS: The frequency of the lowest mode was shifted to the low frequency. The Q of the third mode became low.
3. TM: The gain from L/H3 to L was larger than the reference a little.