Typhoon I normally don’t love light weight shafts, but I did build a Pin Hawk 5 iron with a Matrix Kujo 85g shaft and I am better with that club than anything in my bag. That was a cheap experiment, I’d like to try a whole set and found a pretty smoking deal on some Cobra’s with similar specs.
All in all the answer is, I don’t know if it’s right, but it seems good after 2 years of playing with that club.