Same dimensions and tile combination as the Basic model but this one comes with 3 overlays (O2H1, O2H2 and O2H3), 5 x 100mm x 50mm and 1 x 50mm x 50mm forest terrain bases and a road camber template. If you want to build your world using the Griffin Terrain System model, this is the place to start. A full online tutorial system will help guide you through the tricky bits
