Try a smaller sail, really !
It can be even more enjoyable with something easy and soft/er around 7-8m.
At first, everyone just thinks to throw more sail at it like FW and power it into performance.
STOP. right there.
This thing has a LOT more to offer than just outright "speed".
It's much more about the experience more than the performance.
(strange comment coming from me, agree, but it's true)
Cheers ~ Ian
PS : Jim officially estimated my board speed between 4 and 5kts in zero wind. That was consistant pumping (actually "fanning" in case of Serenity+7.5m Glide+70cm). Yes, there were plenty of fishing pole flags on the pure glass course to indicate "nothing". And it was dawn.