LLO_12/01/2022: according to alog 33790 (https://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=33790), the ADC_1_12&13 are no longer used for corner 3 Press/Diff GS13 (table of ADC channels on page 3 of this document). These 2 channels are now used for 2 vertical L4Cs on HAM1 passive stack table at LLO.