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flowmaster said..
@ Colas
Flexibility off normal glass is the go I gues ?
It depends on preferences.
By trying to flex the fins by hand I'd say the carbon Quobba (which have 4% carbon if I recall well) flex twice less than the glass ones, which seems as rigid as FCS "PC" construction.
On the water, I find that the Quobba carbons provide a more positive feel, useful for pushing hard on them (vertical surfing), while the glass provide for a smoother drive (horizontal surfing). By taste I would prefer the glass ones, then.
I tend to use carbons on the sides and glass on the rears.
And all glass for my small wave board (the Mob) to enhance "pumpability".
But using only carbon or only glass won't bother me, the difference is not so big.
Note that carbon may be better for the FCS versions, to compensate the fact that FCS 1 tabs provide less rigidity than the future base.