After Jason got another shot of the table alignment this morning, Mitch and I proceeded with attaching the HEPI actuators. HEPI was gently locked, dial indicators were rezeroed and we went to each corner and attached the horizontal actuators first.

We started by bringing the actuator close enough to get the spacer and the screws in, then pressed the actuator agains the foot. After the actuator was bolted to the foot, the connections to the "knee-breaker" on the side were tightened down, the IPS was centered and then centering shim and locking screws were removed, unlocking the actuator. If the moved from center by a few 1000 cts, we started the process over.

After lunch we started the verticals. Kind of similar, a small bottle jack and some cribbing were used to raise the locked, shimmed actuator to the foot and bolted the tripod to the foot. The lower part of the actuator was then attached to the pier, IPS recentered and shims were removed. These were a lot easier to unlock without moving the IPS.

HEPI was then unlocked and I looked at how much we disturbed the IPS and dial indicators. 2 IPS were bad enough I locked the foot at that pier and adjusted the actuator to better center the IPS. According to the dial indicators we moved about 1/3-1/2 mm +X. 

Tomorrow we will take another round of measurements with Jason and decide to go from there. I think we might want to do some careful sub-1/4mm moves, but Jason's numbers will be the deciding point. We may also want to finish some small parts installs in chamber before handing the chamber back to ISC.