Opened up the ring heaters on BSC 3, as well as checking to see how they survived the Stress Test. I couldn't find any obvious issues. There didn't appear to be any breaks in the macor or the glass.

For BSC 1 I consulted with Hugh Radkins to lock the ISI. After it was locked I opened up the ring heaters there as well. BSC 1 had the older style of ring heater but this didn't make any difference as these ring heaters had no obvious failures either. With the optic in the way a thorough check was not possible. Once the quad structures are removed, as well as the optics, a more thorough check will be possible.