blokart/Landsailing Whileboard Pieces

I've created a design of a blokart or landsailer with magnets to use on a whiteboard to describe sailing situations (and especially sailing rules). Assembling the piece requires: 1x M2 x 4mm machine-screw (to attach the sail to the base). 1x 10mm dia. x 2mm thick magnet 1x 3mm dia. x 2mm thick magnet