Great Product, Great Service
I wasn't expecting that much improvement in performance after installing The FCS II Mark Richards Twin + Stabiliser Fins. Riding an MR "RocketFish" the fins are a perfect match. They enable much tighter turns in the pocket with the feeling of response and control. There is no loss of stability really as a trade off for increased manoeuvrability. This set up would suit other fish/twin fin inspired designed boards.