I found a nice multicolor button that worked for the original PiGRRL and PiGRRL 2, but it didn't work all that well for the PiGRRL Zero as Noel modified the size of the button slightly. I've since modified this to work perfect with all iterations of the PiGRRL Zero. Make sure you print the Caps in PLA and the Base in Ninjaflex or Semiflex for best quality and function.