Up grading mat board kits from the old E. Suydam company purchased about thirty years ago for about $4.50 each. I have three of them in a row on a spur track that I call Suydam Siding. This is a preservation of history from the hobby itself. It would require a lot of text to describe all the changes made on the original models in the left column. You fellas that are able to do this just need pictures to work from for inspiration.