For really rigid wheels I tried cutting up an accordion file and gluing the templates to it with a glue stick. I just made the rear of the device. I mounted each wheel template on a piece of accordion file cut to the same size. For fastening I used a push pin and a pencil eraser. It works great! Thanks to hitman for the templates, KLH for his amazing manual and to Puster Bill for showing the way. Great work gents!
