Commissioners were complaining of excess arm motion, so I've changed the blends on the beamline directions on St1, from the nominal 45mhz blends to 90mhz. To review for those not in the seismic know, this is done by opening the St1 Blend screen from the BSC ISI overview and clicking on the 90mhz blend in the appropriate direction (i.e. X for ETMX, Y for ETMY). Attached screens show overview with circled blend screen, St1 Blend overview, close up the blend X bank. It's not perfectly clear that we need to be using the 45mhz blend or if the 90mhz blend is good enough, but I've been talking to some of the commissioner about maybe doing an assessment when it's convenient.