Did another initial y-arm alignment from scratch. - TMS pointing to hit the center of ITMY, with the hitting-catch-at-all-four-cardinal-directions technique (Pitch -107.0, Yaw: -25) - ITMY pointo to the Baffle PD's: BPD 1: Pitch: 197.0, Yaw -157.5 BPD 4: Pitch: 230.7, Yaw -191.5 Center: Pitch: 213.85,Yaw -174.5 - EMTY pointing to center, with the hitting-catch-at-all-four-cardinal-directions technique (Pitch -107.7, Yaw: -34.1) - This brought back good flashes at the center of the reference camera, without any move of the BS or PR3.