Spring is here, time to sharpen our paddles! While you’re doing that, here’s a Seawave sailing vid with a sail kit (right) from kayaksailor.com. With the lee boards it all looks a bit complicated for me, but perhaps that explains how they manage without a rudder. Notice the hull folding up from 1:40. Don’t know if that’s down to the breakneck speed under sail, or he needs some uprated side chamber PRVs.
For more sail posts, see the IK sailing category somewhere on the right.