The ITMY PI path was measured during maintenance day driving from CDS and measuriung the quadrant outputs to the ESD. WP#5931
Specifically driving H1:SUS-ITMX_PI_OMC_DAMP_MODE2_DAMP_EXC, and measuring P2-P5 of D1600122 directly with an SR785.

Generally behaves well.  The LR channel has slight excess noise (about twice the other channels) which is a ~65kHz signal.  It goes away when the DAQ input to the box is removed.   There was no evidence of the glitchy behaviour of ETMX LR channel.
Other than that it looks just like the ETMX.  The electronics TFs slightly over estimating the HF voltages.