Sorry for the simple query; know it has to be in the manual! When one loads an engine manually into the Cab 2, the info for TMCC MODE choices of CAB 1 MODE/TMCC/R100/LEG. I believe engines upgraded to TMCC go under CAB 1 and Lionel factory TMCC go under TMCC; what is R100? Leg is obvious to me; input and confirmations is appreciated. Falcon70
PS Manual reference is appreciated (RTFI is not a sign of weakness for me!)