I don't want to continue to prolong this fight - but making a quality symmetric curved foil is incredibly more difficult than making a straight one. The tooling alone requires a lot more material, engineering (with quality software tools), and time.
I don't understand this. Yeah you'll have a bit more aluminum(or whatever metal they make molds out of), and a bit more time into drawing it, but 4 axis machining is nothing new. The actual laminating tools themselves can't be that different. You will pay a premium for the machining as not every hick machine shop with cnc capacity can do it.
I realize you're covering the cost of all the R+D to come up with a final product with all of subsequent parts that come out that mold as well.
What could be more complicated about laying up material in a curve, vs in a straight line?
I honestly know next to nothing about boat construction, so there's my disclaimer.
