J. Kissel Following the same procedure outlined in LHO aLOGs 9453 and 9079, I balanced the coils on the PUM stage of H1 SUS ITMX. The final balanced gains in the L2_COILOUTF bank are H1 SUS ETMX Channel Balanced COILOUTF Gain L2 UL +0.909 L2 LL -0.965 L2 UR -1.035 L2 LR +1.099 The precision to which we could balance the coils was limited by the really windy day ground motion, but we believe the obtained values are good to within +/- 0.5%. This balancing has reduced the L3 P and Y caused by a L2 pringle excitation at 4 [Hz] by DOF Reduction Factor @ 4.0 [Hz] P > 14.6 (peak below the noise, and totally incoherent) Y > 10.1 (peak below the noise, and only ~45% coherent) The attachment shows the result from which these values were obtained, comparing the optical lever ASD at 4 [Hz] driven from L2 at the same amplitude for both balanced and unbalanced configurations.