The Atlas trucks are modified to mount with E ring like the Lionel. Lionel trucks are such a bear to work with I decided to just replace them for 3RS. The brass wipers are an experiment to cut down on flickering lights. Works great so far.
This next I-12 has an ERR Mini Commander inside for the soul purpose of operating my coil Kadee coupler.
Can be remotely uncoupled anyplace on the layout for picking up or dropping off freight cars.