Shars 3" Parallels Gridfinity Holder

This is a basic holder for an 8 piece set of 3" machining parallels sold by Shars.  They're sold as being 5/32" thick, but are actually 4mm thick.  I bought them for use with my drill press vise, but they would also be useful on a mill in a small vise of course.  They can fit in only 1x2 squares, but I had to put them together in just one big recess in order to get them to fit.  Going to individual slots for each size pair would have doubled the size of the holder, which seemed to be stupid to me.

So, to keep them from falling out if the drawer they're in is slammed open or closed, I added extensions in the front and back, but left the tray relatively open on the sides, to keep the parallels relatively easy to grasp and put away.

Like my other Gridfinity models, the base is altered to accept 6x3 magnets as a press fit, with the upper surface of the magnet holes modified to make the slicer bridge across correctly for a clean result.

The unit pictured was printed out of Overture PLA on my Bear upgraded Mk3S+, using a 0.6mm nozzle, at 0.3mm layer height.