Betsy called me out after they were done in BSC3, so I went out and unlocked the ISI, the shifts from the locked position are pretty good, considering the new optic. I've now taken tfs, they look okay with the typical caveats about in air measurements, with people working nearby. First attached plot shows the ST1 L4C tfs, second plot shows the ST2 GS13 tfs. ST2 resonances are a little fuzzy, ST1 resonances are pretty clean.