I've printed this thing off before, but never in two colors. You could manage this easily with a single extruder, but it's nice to print the whole thing without having to fiddle. Left Extruder: 0.6mm nozzle with E3D Everyday PLA Right Extruder: 0.4mm nozzle with eSun Black PLA Bed @ 75 Nozzles at 205 for white, then down to 195 for black. Model is 2.1mm thick (3 layers of white and 4 layers of black) @ 0.3 layer height. I've parameterized this model and will post the customizer to Thingiverse so you can output the content at any size or thickness for each nozzle and then quickly assemble in S3D.