Mark B. I installed damping filters on BSTST per advice of Stuart. The FM1 filters are as per ITMy and the FM2 are all "lp25": cheby1("LowPass",4,1,25). It damps happily with the gains Stuart had been using at LLO: L = -2.00 T = -5.00 V = -4.00 R = -0.20 P = -0.04 Y = -0.05