Picked up a used 5'6 x 19 3/4 x 2 3/8 Hypto Krypto with FCS 2 fin system. Came with plastic Accelerators and board feels a little stiff. Could just be the design with the low tail rocker and narrow pin tail but was thinking some different fins might loosen it up. Got a bunch of older FCS fins and could get one of those adapter kits. Any suggestions? I'm 5'10 about 160 lbs. Realize it's more of an alternative design and might just need to get used to how it surfs and let the board do a little more work and not force my turns as much.