If I had a wish list of improvements for the I20 it would be first a deck that's level with the main beam on the leading edge. I can feel so much speed bleed off as water pounds the front beam as it flows over the top of the deck (usually under spinnaker in waves). Second, more height for the rear beam...the bucking bronco wave slap is A) not fun B) surprising and can make you loose your balance and C) knocks you out of the speed groove.
(the Mega Cat Playstation had problems with rear beam slap...can you imagine what that was like!?)
As for beam slap... I just finished my risers for the rear beam on the HT. I know the rear beam on the N20 isn't round, but you could engineer something. I took 4 inch OD al tubing and cut the tops off, basically flipped them, welded them put in a base of epoxy with filler to make up the ID/OD difference and they are nice. Went out today in chop with 20kn of winds and didn't slap but maybe once.
Dunno if this screws with the one design deal though...
