The BRSY measured spot is getting close to the edge of its ccd. The driftmon is about 12000 cts, out of +/-16k. This doesn't necessarily indicate that we have 4k cts range left, it's probably something more like 2k. I think that because the reflected spot is headed away from the reference spot, it may not be so bad if it drifts off the edge.

This became a problem because on Tuesday I found a gap under one of the sides of the BRSY box when I was plugging in the thermocouples. Now that I've closed that gap, the box has heated up .4 deg C. That is about 3k counts and in a bad direction. Don't know how long the gap was there, but probably for a while. Attached plot shows about Monday to now, the big increase in the driftmon and brs temperature are after I closed the gap. The VEA temp average has been more or less stable over this time. I'm also not applying any voltage on this BRS, and that wouldn't help at this point anyway.