Light parameterized mini magnetic picture frame

A frame intended for small photos or artworks which will either sit on a separate stand, or be stuck on with magnets. To save material and printing time, the parts are hollow, with walls of selectable thickness. The frame is in two parts – the actual frame, and a backing piece or “block” that snaps in to hold the artwork in place without gluing parts together (though you can glue it if you wish, of course). The model is designed for easy printing – the pieces are correctly oriented in the STL file, and generally you will not need a brim or supports (see below for exception). Note: the project Parameterized Picture Mat by Tyler Tork is useful in conjunction with this model.ParametersThe size of the space to leave inside for the artwork (including depth).The width and depth of the frame border.The size of the ledge in the frame to hold the frame contents in from the front.How far back the contents will be set from the front of the frame.Whether there will be magnets on the back, and thei