was thinking about either a smaller daggerboard or possibly trying to remove the build up speed before pointing part as with a bit of luck the blade shouldn't stall as easy?
i appreciate that you would end up with time sawing through the daggerboard case, are there any class rules banning fixed daggerboards?
No rule against having a fixed centerboard, however you might have some problems with the chine rule and you would have to cut the top of your mast off as the lowest part of your hull would now be even lower.
It might be eisier to set it up so it comes in and out the bottom as the moths do.
The trouble with most of these things is they work well in a restricted speed and angle of attack range but outside that are very draggy. How do you design it for what you want, you know what works for the whale but it has a different speed range to a Cherub