Can shed some light on performance and construction if you take the word of the builder.
That particular shape, the 9-1 Paha, gives the rider all he or she can ask for in short board performance. The bottom starts out with subtle concave in the nose and moves almost immediately into a rolled panel V through the belly. Then transitions into a double barrel towards the forward fins ending in a V at the tail. The nose profile is a bit fuller that one is used to seeing. Not so foiled or pulled in that you loose stability at the take off. Super smooth and wants to lay over on a rail straight away.
The board is relatively thin at 3 7/8" allowing for more of a surfboard type rail. tight hard edges help to give the board more push. Set up as a quad really lights this model up.
We've been experimenting with this model for some months now and have perfected a 16 lb PVC model as well as a 13 lb carbon model. They are not hollow construction in case you're wondering. Our standard light boards in that size range come in at about 20.5 lbs. The result of testing the lighter boards is just more performance.
A new twist on this model is in the works. We're incorporating a tri-plane hull in place of the panel v. All indications are thumbs up so more to come on this.