Initially using a 10.8 X-15, then the wind finally picked up late in the day.

Completely maxed out I was curious to know how the Formula board would sail with an 8.6 and a smaller fin taken from the isonic.

The answer is it goes quite well, although upwind at low speed is not good with nothing much to push against.

Never really maxed out on the 8.6 - a bit more wind would have been interesting.