Oo gauge extend your basic track layout use with or without the hornby trakmat hornby dcc compatible authentic hornby track extend your set in easy steps by adding track packs and trakmat accessory packs all the way to the full layout pictured on your trakmat scenic underlay sheet add extension pack e to the starter oval plus extension packs a b c and d to make this layout pack includes 2 x straight 1 x double straight 1 x 2nd radius curve 2 x double curve 2nd radius 1 x rh point 1 x buffe