Update 03 August 2018
I was fortunate enough to see the 1701 in action today.
Witnessed the 1701 arriving at Island Road to move the (6) NAHX empties to the secondary switch.
NAHX 93891
NAHX 94349
NAHX 93721
NAHX 94010
NAHX 94254
NAHX 93954
The confusing part was it appeared to be (2) TILX cars (30760 & 30873) full on the siding at the switch.
The 1701 simply pushed the empties and connected the string.
I thought the 1701 would have dropped the NAHX cars on the Millis siding, run around and picked up the TILX cars, reversed, then pushed the empty NAHX to the switch, and finally moved the TILX cars to Island road.
Maybe I missed something.