I did it in my D4 which is a similar multi-emitter TIR. I upgraded this light to MELD UI with RGB, white, and UV. I generally don’t need any special beam pattern for the colors so I did it with a dedomed XML-RGBW pressed right up against the flat area of the lens. This way three of the optics can still be for white emitters (and the fourth for UV). Here are some pictures:
