With Koji's help, I measured the length of the Mode Cleaner.
The new modulation frequencies (as quoted on the Marconi front panels) are:
The Frequency Counter readback is 165980584.101 Hz (a 4Hz difference). All of the Marconi's front-panel frequencies read ###.##### MHz Ext, and the Frequency standard has it's "locked" light illuminated, and the 1pps input light blinking, so I think everything is still nicely locked to the frequency standard, and the frequency standard is locked to the GPS.
While changing the marconi's, I accidentally touched the MC's 29.5 MHz marconi. It is set back to the nominal value (according to Kiwamu's rack photos) of 29.485MHz. But the phase might be sketchy, although hopefully this doesn't matter since we don't do a double demodulation with it.
I also ran the scripts in the wiki page: How To/Diagonalize DRMI Length Control to set the DD Phases.