I got a 220V version of the FX-888 from aliexpress recently. Inspired by Dave's video I ran to a local store and bought a dual colour LED. However, back home I realized it was a different type than that used by Dave. Darn, I am such a bloody beginner, I did not even realize there could be different types!
My red/green LED has a common cathode. So I had to re-invent the whole boodle. Sorry, it's done with bipolars. But hey, I got it working. My first mod ever and it became a success once I fiddled a couple of stripes of rubber tape in between some of the legs of the messy flying composition. I was so happy, I really wish everyone interested in electronics can have such a blast once in a while.
In contrary to the specimen hacked in the video, my FX-888 does not have a 9V PWM signal on the original LED, but 16V with a bit of a ripple on top. So I dropped the caps and threw in an extra transistor.
Hope this helps you in doing your own hack. Keep it frizzling!