Hi Matt,
Thanks for the feedback - we usually choose the best all-round fin to supply with the boards. But there is such a huge difference in user weights, heights, skill levels, type of sails and local conditions, that it's very hard to make concrete judgements about after market fins and which ones would work best. What we generally find is that any fin 1-3cm bigger or smaller on most of our Freeride/Freemove boards works best, whilst waveboards/freewave it's obviously a smaller nr, approx 1-2cm max difference. I have to say that generally the fins we supply work fine for at least 2-4 sail sizes, but of course the boards can be tuned further with bigger/smaller or more high end type of slalom fins if needed?