That all sounds fine, Erik. The fin sizes are perfect. Get your mast foot forward, in front of the sweet spot by 2 cm at least. Do not move the footstraps back. Itīs just necessary for a very light person. Try to find a good balance of the board now with teh new mast foot position. The nose should stay down. Concerning the straps: if itīs very choppy, reduce the distance in between the front and backstrap. Sure you cam play around with different footstrappositions. But sail the board with the mastbase further in front. I would suggest to change only one part of your system.
You could get a video doen and we could discuss your position on the board.
Hope I can help you to feel fine on the iSonic 86.
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