Bit more detail on the traverser design...
outer frame of 70mm pine, 4ft x 2ft. attached to the inside of this frame are battens of 34mm pine with two struts, creating a kind of shelf. Onto this shelf is nailed 3mm hardboard (shiny side up). On the two upper edges of the 70mm pine frame, some strips of 9mm ply are attached to act as the base for spur sidings one end [made live by push-to-make switches] and the common exit (to layout) on the other side. The actual traverser is created as a box of 34mm pine with a piece of 3mm hardboard underneath (shiny side down) and 6mm ply on top. Thus the traverser 'floats' between the two shiny sides of the hardboard and there is just a 1mm total height difference between the traverser and the board top, which can be sorted by a bit of cork underlay...
Colin
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