To prepare for tuning the contrast defect, I turned both 50W CO2 lasers on today, both have a beam dump inserted at the bottom of the periscope so they're currently not being injected into the chamber.  As soon as we transition to laser hazard, I will remove the dumps.

The guardian is now running these lasers and found a decent lock point for the chiller and pzt servo so that's good.  One thing that was confusing was that the laser power readback was going negative at the ADC which historically never happens, Dave Barker helped me track it down to an AA chassis that was switched off in the TCS racks.  Why someone would turn them off is confusing but also why we still got signals at the ADC even though the AA is off is equally confusing.