Loz79 said..
Do you really get that feeling from the c drives colas??,
Yes, but you must push on them to feel the "squirt", so I don't think they work on bigger (>8') boards, as in my experience they tend to make the board too stiff, unless you are out in solid conditions where you can push an 8'+ board in turns.
In a nutshell, if you can "pump" your board, it means your gear can benefit from the C-Drive.
Also, they have a lot of grip at low speed, which helps a lot for SUPs while paddling for a wave, you can master the row more easily. Plus the reduced area speeds up the U-Turns in front of an incoming wave for these late take offs.
The only drawbacks I found were:
- maybe a bit more drag than optimally foiled fins such as the FCS Nexus
- some people are put off by the transition between extra grip on the bottom but looseness at the top
- quad setup can be tricky. Rear C-Drives can make some quads too stiff. In this case, just use C-Drives only for the front fins.
Note that it can help on long boards, too: I have 2 C-Drive in the front on my 8'4", but a central rear nexus to loosen it a bit