The original Mamod Railway System has been produced by MSS (formally Mamod Sales & Service) since 1996. MSS produce a number of loco variants. The most well know is probably the Side Tank loco, being the same design as the original Mamod SL. MSS also manufacture the Saddle Tank loco and supply matching tenders as well as a range of complementary rolling stock. MSS produce a lock together track and points system made from durable cast metal. As well as using Mamod SL donor engines, I also use MSS loco's and parts. PJLW MSS engines and 'MSSification' builds can be found here.