Tools and materials
Marking out tools (ruler, compasses, pencil), a craft knife and cutting mat.
Two or three sheets of stiff card (approximately A3, depending on scope size) – preferably black, although it can be painted.
Sticky tape, craft glue and Velcro.
For the finish you will need some spray paint (if the card requires it), varnish or lacquer to make it moisture resistant and a white marker pen.