Alkem Scale Models ( http://www.alkemscalemodels.com) is using laser cutting technology to simulate concrete tunnel portals used by the B&O, C&O and D&RGW railroads. Available in both HO and N scale, the models use multiple layers of acrylic of various thicknesses to recreate an accurate rendition of the prototype tunnels. The inner layer is designed to accept a thin styrene sheet (not included) to allow more realistic modeling of the tunnel lining. Custom engraving of other names on the tunnels is available for an additional charge of $10 per portal. For additional information send Bernie Kempinski an email at info@alkemscalemodels.com.