JF SMO and the REVO, hands down are the lowest deflection. SMO actually wins out as my overall best CF shaft since it has a nicer hit feel than the Revo. Although I may rate CF shafts a bit differently than most, in my view, if you get a CF shaft it should be somewhat different in performance and feel than a wood shaft. I am not trying to find a CF shaft that acts like a wood shaft, I want something new and different with benefits more than just durability. I never had to replace a wood shaft due to warping or other damage, so I want my CF shafts to offer something else.