Requires Original Lifelike C420 chassis (buy 2nd hand) The model represents Steam railmotorNo's 17,18 & 25 Withdrawn 1919-20 and converted to non-powered Auto Trailers (You can use Bachmanns GP50 (stocked) twin ended drive and disconnect one drive to extend the body, not an expensive chassis but you will need care to disconnect drive (NB this will invalidate any warranty Bachmann supply with the unit) Unpainted kit