S. Biscans, J. Kissel, N. Mazumder, H. Paris, H. Radkins, B. Shapiro, J. Warner After an extremely productive two weeks -- thanks to the new years present of Narwita, Seb, Hugo, and Brett all arriving within the same few days -- I figure it would be good assess where the LHO SEI team's priorities lie from here on. In particular, what *other* things that we could be doing to improve *all* the platforms instead of continuing to bang our head against the HAM3-0.6-[Hz]-feature wall. Here're the remaining activities, sort of prioritized, and split into "Improve the chamber noise performance" and "improve the maintainability / extensibility" groups. Improve The Chamber Noise Performance: All Chambers Benefit to IFO - ST 01 L4C Feed Forward (all 6 DOFs), improve 1 to 10 [Hz] performance - Sensor correction gain matching (all 3 DOFs), improve 0.08 to 3 [Hz] performance BSCs Only - Z to RZ subtraction, reduce BSC optic's yaw below 0.08 [Hz] - Implement Slow MICH, reduce MICH velocity, improving lock acquisition - Finish ITM HEPI Z to RX/RY Tilt Decoupling, reduce BSC optic's yaw below 0.08 [Hz] HAMs Only - HAMs 2,3,4,5 Isolation Loop Gain Increase improve 0.5 [Hz] to 20 [Hz] performance - Continue HAM3 0.6 [Hz] feature investigation improve 0.6 [Hz] performance Improve the Maintainability / Extensibility: - BSC-ISI Noise Budget Model - HAM-ISI Noise Budget Model - HEPI Noise Budget Model - Assess guardian vs. watchdog robustness of bringing all chambers to OFFLINE from FULLY_ISOLATED - Put MATCH OUTPUT channels on Sensor Correction overview screen - Storing more than just RZ on HEPI alignment - Hook IOP SWWD signals up to ISI USER watchdog - Install HEPI saturable integrators - Remove HEPI / ST0 L4C Sensor Correction path from ISI models - Differential Pump Pressure signals are noisy possibly from poor electrical grounding - Switch ETMX to using differential pressure signal - Assess whether switching to differential pressure affects platform noise performance