I wanted a Dominoes tray for game play. I originally printed the versions available on Pinshape but found they were larger than necessary and used too much plastic to print.
I set out to design a lighter version with a smaller footprint that is stable enough for a moving table (people I play with get very excited) I was inspired by Felix Garcia's version - https://pinshape.com/items/376...
In my test prints I found it's best to print at .2mm layer height with 2 parameters (.4 nozzle and .5 nozzle). Depending on your printer bed size, you can print horizontally or vertically both without support.