After SUS made sure everything was clear and not biasing the measurements, IAS gave us direction. We moved the ITMy HEPI down 1.3mm, & 0.8mm North and tried to do no Yaw. After this we locked the ISI and looked at the level of the Optical Table. We saw a runout of 0.019" on the Optical Table. We did a tilt correction, down on the SE corner and up on the NW of ~0.2mm each. This put our runout on the Optical Table measurements at 0.12mm. Then, wouldn't ya know it, IAS says we have to Yaw 577urad CW. So we turned the HEPI Springs 1/2turn each for CW yaw and that got us under 100urad. Have to say after doing that I do want to confirm the Optical Table is still level.