I had a thruster set that I used on a 9'8" sandreef fish, worked really well on that board, but just didn't seem to be as good on any other boards I've had.

Can you get them to suit future boxes ?

Sorry rik thought you were someone else . Old and wise with no glasses

You can read what I wrote about them at: www.standupzone.com/forum/index.php?topic=15007.0

They are only available in FCS boxes,. not Futures.
Here is a video on a short quad SUP, with C-Drive twin fins fronts, and small "QS" rears


[URL=imgur.com/bROZY] [/URL]

The C-Drive give me noticeably more speed out of turn, and more control. If you do not push on your legs in turns however, their natural speed being less than normal fins, you may be better off with normal fins. I now use C-Drive fins on all my ShortSUPs, but the jury is still out on 8+ boards, where I like also fast, more playful fins like the scarfinis. Some people do not like extra grip feeling they get with C-Drives. Test for yourself!