I mounted these on think CD jewel cases (2mm thick). I included a file for the base to print, but even on a .3mm layer thickness, it will take over 2 hours to print the base.
Please print without supports.
I would suggest printing at .25mm as the maximum layer thickness; ideally use .2mm but if you print at .3mm you may experience skipping in the print.
I used aquarium gravel, kitty litter and small bits of craft wood to finish the pieces.