Current one I soldered myself, but the cheap iron I got from Amazon does not get hot enough on the smallest tip to allow me to solder the lights, so for now it’s not backlit. Also one of the keys fails every once in a while even though everything is soldered correctly, I think it’s the controller, LPT if you have a split keyboard with an TRRS cable, don’t unplug the TRRS while the keyboard is plugged, apparently that can cause power surges, which I only read after doing that, and starting getting that error with that key… Luckily I planned ahead and have the chip built on a plug, so all I have to do is buy a replacement and solder the pins, but since most of the time it works I keep forgetting about it.