That's a shame about the Bimmian needles. I have yet to do this mod and really want to but am petrified of damaging my cluster somehow. It all looks easy, provided you have enough heat control from a good soldering iron to work with the emitters.
I still have a set of red needles from a E60 M5 and am hoping they work but am told the posts on the 5-series are slightly larger in diameter than the servos of the E9X cluster. I suppose I could also try the hot glue route if there isn't too much play once fitted.