Firstly the curved board takes a lot more load. Due to its shape it is trying to pick the boat and its passengers up out of the water. The only production boats successfully picking a boat out of the water and keeping it above are the moths. McConaghy's in China can build the hulls very quickly, but lead times in delivery are delayed due to the time and engineering to make the foils. To get the required strength they put 500kg of weight on the foil when curing to help increase density and strength in the carbon. The finished foils are relatively light and you can put the ends between 2 benches and jump in the middle with minimal deflection. This is the level of tooling and manufacturing required to make curved boards work. The early foilers like Bladeriders would have the foils flex under the loads and this is effectively like having your leech flap upwind so would lose speed and power. The Mach2 under the method described just power forward in the gusts and reach incredible speeds. (33.8 knots peak is the latest top speed for a Mach2) Hence my comment in that it moves the class out of the homebuilder. Would certainly be a performance boost however to the boat.