I bought an LGB 23192 C&S #8 Sound Mogul that someone installed a LGB 55021 DCC decoder into the engine and another one in the tender. I haven't disassembled them to see how the prior owner had installed them. On DCC power, the lights and firebox lights work, the operating sounds work, the Sound Activation Unit for track magnets works, the smoke unit is activated with F3, but I can't get the whistle and bell to activate with any FKeys. Does anyone know what CVs I can adjust for assigning the FKeys for activating the whistle and bell? Maybe it can't be done with these older analog sound boards?