Magnetic plate for dimond whetstones

Ideally, created to have 4 9mm coin neodymium magnets to fix 115*75mm diamond coated steel sheets to be mounted flush on top and it has a base that can accommodate another sharpening stone inside its base both pieces are meant to allow for sharpening free hand or with certain kinds of guides. 

Note: Due to its dimensions cant be printed in one piece on small printers like the Prusa mini which is the only kind of printer I have right now:(.