A short list of problems with fins and a possible solution: a bigger or a smaller fin.
  • Board doesn't point well upwind: bigger
  • Board planes up badly: bigger
  • Board isn't fast: smaller
  • Board tends to head up into the wind: smaller
  • Board tends to bear away: bigger
  • Board spins out a lot: smaller when overpowered; bigger in light wind
  • Board tends to 'take off'/is restless: smaller
  • Board sits too 'low' in the water: bigger
  • Board has no control during jibes: smaller
  • Too much pressure on the front foot: bigger
  • Too much pressure on the back foot: smaller