Panel 1 - Keypad, LCD and Fan speed controller with one switch.Panel 2 - Keypad and LCD only.Panel 3 - Keypad, LCD and a blank space for switches etc.Panel 4 - Keypad, LCD and two switches.Please check dimensions etc before you print them, the knob is a quick one I designed when I couldn't find one suitable. 1) Print it ;-) 2) Bolt stuff to it 3) Bolt to printer The buttons can be found here thingiverse.com/thing:27766 On my printer the switch is for two strips of LEDs across the top, and I have one LED for the hot end and another for the HBP.