Extruded pink foam (glued to plywood) with O-gauge cork glued atop the foam has worked very well for laying track and creating scenery on my model railroad. The cork holds track screws well and, if you prefer, a bit of epoxy can be applied to the tip of the screw to permanently fasten it into the cork. This type of construction makes for lightweight terrain that can easily be stacked and carved to create hills, valleys, riverbeds, cuts and fills.
MELGAR
