“I was pleasantly surprised to find it is quite easy to replace the LED with another colour - just use a 3mm through-hole standard LED, pull the actuator cap off, pull the red LED out and push a new one in its place and push the cap back on. There are actually four holes for LED wires so it should be possible to use multi-colour LEDs. Sadly I could not find 3mm NeoPixels or DotStars as this would be ideal, but the smallest size seems to be 5mm.”