I had some problems to tune those carbons when I started to use them some years ago,then I realised that not all the brand are consistent in spine and as good as AL;but they are different to tune than other materials,being more sensitive to the lenght than to the weight on the point.When you start to understand it you'll love it,more quiet,tough always straight you can have the finished weight you want.
I used some Alaskan Grizzlystick,some time ago,and I didn't like it because spine inconsistency.IMO.