The cube can be printed with or without supports. You do get a slightly better case for the joystick with supports (the .3mf has painted on supports). You need to print 6 of the joysticks to fit in to each of the 6 joystick holes on the cube sides. If you find that the joysticks are too tight you can print the cube with xy_size_compensation (I found that -.125 works well) to make them fit together easier.