This is a remix of a simple heart but with a tiny hole in it so it can be attached to a necklace or earrings or a keychain. It would print well with catfill or sharkfill from a maerbot if it is stopped at about 60% completion the designs would be visible in the heart.Print with sharkfill or catfill at 10% fill make sure the point of the heart is facing the front of the machine. Stop the print at 50-60%. I scaled this to 15mmx15mmx5mm and stopped at 50% it printed well but to get the infill shape centered you would have to move it around a bit. The hole worked nicely on standard quality.