Found and modeled after a 2 Sided dice I've come across with rounded corners, makes it less of a coin flip and more of a dice roll, will update with a cool D4, and D3 later.
After printing, I had to fill in the the sides with the 2s a little with ABS glue to balance the die. When I do a remake, I'll fix it.
I also dropped a bit of black paint into each of the holes and smoothed the entire thing with ABS glue.
Rolls like a champ.