Wizzard,
Could you elaborate, the only reference I can find shows that helicopters are typical of Cat A (ICAO). The reason I ask is that if you are doing 150kts on initial approach, the course reversal procedure for Cat A + B might be too tight in certain wind conditions. I accept that one can always be doing less than 100kts at the threshold making the last bit cat A, but my understanding is that your cat depends on your speeds at all points of the approach and go around.