9mm block
thingiverse
I have proofed this design to hold cases steady and be easy for guys like me with big fingers to handle each case, but if you bump the bench cases don't go flying.
Download Model from thingiverse
With this file you will be able to print 9mm block with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on 9mm block.