@stan2004 posted:I'd be interested in hearing from anyone interested in a DIY modification to the operating signalman caboose. The MTH 20-91636 operating Santa caboose apparently simply replaces the signalman figure with a Santa figure as the online manual is for the "generic" N6b Operating Caboose.
If you're interested, I describe a solution using an Arduino with a 900 MHz radio module to achieve TMCC control of the signalman caboose in this thread.