i run it with 32cm Tectonics T43 with Zero Cant and it flies. The raceboard doesnt even come close to the top speed of the SL63.
The Slalom is also a lot easier, more gentle and forgiving to ride than the raceboards with their big canted fins.
I just love the feel riding this board. Its effortless and fast and still goes upwind pretty decent.
Weigh of my SL63 Proto Custom is 4.3kg naked.