Have all 3. in order of preference.. for what its worth. I really don't care for the carbon tech. while they can yield better response than stock fiber or metal reeds depending on application. If your going to open it up and replace.. pay few dollars more and go with a nicer crisper set like vforce or boyesens. next time I am replacing Yamaha reeds. I will be calling Jetworks for a set of his 2 stage carbon mono reeds. food for thought. good luck
1-Vforce
2-Boyesen
3-carbon tech