After 100l/6m earlier changed to 78l/4.7m as wind had increased a bit and sea was much choppier but was fun rather than pain. Bore off once and got 25.2 knots so pleased on wave board. Interested in Alpha was 16.7knots , so less that 19knots on 100l.6m earlier but most runs were slower going in and harder to keep small board planing and accelerate back out so still pleased.. Gave up as getting tired after second session of day.