See attached for GS-13 Spectra comparing this morning (~4am) when it was damped and same time Tuesday when the ISI was not damped.  Wednesday data was corrupted.  Notice main peak reduced but see the unsuppressed peak and in some dofs (Y especially) amplification of peaks.  RichM and I looked at the damping loops and they look good and the plant doesn't show these peaks even though HEPI was locked during the TFs.  Still we're expecting these to go away when we unlock HEPI.  Otherwise, not so good.  We'll see.