No extra for a custom cardboard rrp $850
I have tried many prototype lightwind boards from them and the one
we have settled on is great. Early planing and rides well in chop and if the wind picks. Nice and light for the size, and importantly they don't need to go to the extra weight of a wood core to get the board strength as they have it sussed out perfectly. Ring Dan at the factory and he will go through all the pro's and cons.
I would go for a 136x45ish, single concave wide stance, soft flex option!
Ask him for the 'special' set up re rocker and outline