Hi, I use kode 86 in b&J conditions, and on/side on conditions, ok not in ideal wave riding conditions where I use a pure wave board.
Range at my weight 70kg is from 16 to 30 knots, fins from 26cm to 22cm.
I think best fin in strong wind is 23cm.
The board works well from 5.4 to 4.2, top with 5.4 and 4.7. Top fin 25 and 23, Drake 26 only in flat water and real low wind, I lost a bit the free spirit of the board in particular in the jibe, but you gain in top end speed.
All my friends have try my Kode and they really like it! I really love this board, when I don't use it I switch to radikal wave board, but this board is magic for a normal windsurfing day.
Hope this help