This was the set that changed the O gauge world I remember when it first came out It was that ground breaking A completely new tooling Not a retread I immediately bought it and then the dummy SD-40. It ran smooth as silk I liked it so much I bought two more
As for powering the dummy it will cost you more in parts than it would to just buy another and swap shells You can sell the other as a dummy
Enjoy your set and dont worry about what the dash police say