I have a 455 oil derrick and it operates perfectly. It is on my Ironton AMVETS office layout. I use a separate Lionel transformer that came in the Christmas Trolly set. The unit appears to be complete however there was no contoller with it when I obtained the derrick. I did have to restring the hook, but since I did that duty in the Navy as a Bosuns Mate it was pure pleasue!