Ripped my 7.0 during rigging and had to go with the 7.8. Was really overpowered. Henke (who is one weight class up from me) had full power with 6.4.

First surf with my new (used) SL 55 Pro. Just had to try it even if 7.8 is not the ideal sail. Really, really nice board. I peaked at 36.62 knots which is a step up for me with the 7.8.