I cheched the DRMI stability with the current quite suspensions, and it can be locked for more than 5 min with 3f signals.
Tonight, I will check it can be locked with the arm cavity on resonance, and if it can be being locked, that would be a great news.

- I found the SRM model sampling rate is 2 kHz, and due to that, the SRCL loop UGF is less than 20 Hz. We gonna change 16 kHz today.
- PRM ASC is working well. I used it in the initial alignment state and makes me so happy