It occurred to me last night that instead of doing measurements, I could figure out the gains from comparing the results of one measurement I remembered the settings for (because it was recent, but wrong) to a more distant measurement that was "right"(or at least things work). The GS-13's have to be run in low gain, or the St1 actuators will saturate them, so they are known. Looking at my data from the 14th (or 4th) of Nov, 2013 (first 2 plots, with "unknown" but "correct" gains) and comparing the magnitudes with the measurement I took on the 6th of this month (plots 3 & 4, with L4C and T240 in low gain) indicates that the T240 should be in high gain, L4C and GS-13 in low gain.