Before O1, LLO installed some high UGF loops and blend filters on their HAM1 HEPI, in an attempt to better isolate some of the steering mirrors in HAM1. When I tried here, I found that our HAM1 piers weren't as stiff as LLO's in some DOF's because the piers had never been grouted. The grouting was done during O1, and Hugh got new tf's over a couple of down days. I just finished working through the commissioning scripts and have some higher UGF loops to install. These higher UGF loops are needed in order to get sufficient gain at a few hertz. Attached is a pdf of the loops. I'll wait for a convenient maintenance day to try installing.