@KHAANNN: the faceW I have (recent batch) has curiously 910 Ohm resistors.
@VentureG: This means that the board can take any normal LEDs that fit the switches, i.e. either 3mm round lipless or 2x3x4mm rectangular.
EDIT: @von_braun: the faceW does support and off-center caps lock, with LED as well. However if you mean that you want a switch which stays down (like MX lock), I didn't see any option for that in the Koreans' configuration tool, so the firmware probably does not support that directly. You can however program it to be (say) left shift, which would mean that when the switch stays down, it will behave as if you would be pressing left shift continuously. That's not quite what Caps Lock normally does, but...