Been working on the Jump Doors. Top guide is 1/8"x1/4" rectangle StripStyrene tube and the top rail is 3/32" H section from Plastruct. I just set up a guide for my dremel tool cutoff wheel and made a grove in the rectangle tube.
Lower guide is 1/8" square tube from StripStyrene that I cut another groove in alittle off center. The lower rail is 1/8" brass C channel from K&S metal. Next on the list is the front doors and the utility door.