I have decided that I should try to build a 7mm scale shunting layout to fit across the back of my motorhome. It needs to fold in half for storage. The available lenght across the van resting on the side window shelves is 6'6". This, conveniently is the length of a standard flush pannelled door. Having a few of these lying about, I found one which was 30" in width. This was cut in half lengthways and one of these halves was again cut lengthways. This gave me two boards 39" long, by 15" wide. The