https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=10331

To recap, OLs, bias sliders and BOSEMs were calibrated using baffle PDs (baffle PD placement is here: https://alog.ligo-wa.caltech.edu/aLOG/uploads/9087_20131224160343_alog.jpg).

OL for ITM has a factor of 2 error somewhere, and the sign convention for OL PIT is inconsistent with SUS convention.

OL for ETM doesn't have a factor of 2, the sign convention for OL PIT is good but YAW is not.