Wind backed off a bit this afternoon to test the 6.3. No really good speed runs ut consistently hitting around 33-34kts averages on the reaches which is pretty good. The board is amazingly controllable and is for sure the best board for the slalom, but I think outright top speed the 90 is quicker for me. I also tried a new proto that felt amazing. I didn't have anyone around to do a proper speed test, but if it is as fast as it felt the sail is going really nice. Sooooo comfortable, it was like freeriding, and hit my second best average using it, even though the wind had backed off a bit by then.