At 1616utc, I changed the epics PID Proportional and Integral parameters from 35 & 0.45 to 20 & 0.07.  These later numbers are what VincentL derived shown in E1100508 in June 2011.  Vincent's Plant included no chambers, so it makes sense that these parameters are not ideal.  But, in an effort to reduce the coupling of the sensor noise, these lower magnitude parameters should lower our UGF and this coupling.  We'll look at coupling to HEPI and ISI signals after a couple hours.