Kazuma, thanks heaps for the great info dump. This is one of the best posts I’ve seen in a long while.What you have worked for and found out is Very interesting. Takes a lot of effort to reach these mind blowing results. Some do seem counter-intuitive but the 50/50 rails makes sense. The nose riders need them to "suck " the water. On a wave such as that, with all that water coming up must be one hellava ride. Thanks for sharing your hard work with us. It’s about as close to getting to that wave as I’ll get.
Kazuma - those toe-in measurements are per fin ?
Absolutely incredible. So far out of my league. MUCH RESPECT to the shapers and riders who dare to take on such challenges. And BIG THANKS to Kazuma for sharing so much!
Yes Patrickfreen, that is per fin. I find without the toe in, the boards track and dig rail making it so dangerous.
Kazuma, may we see some pics of your tail rails please?
Matt
Controlled Drift is a big part of my fin design , allowing the fin to drop down and increase flow thru the fin from that increaesing forward speed constantly .
Fins that don’t reduce area correctly pull you back and overplane - spin out 
Ouch
Chrisp, It is impossible to photograph the detail. Here is my best attempt, I could give more specific numbers which make more sense. I would like to know more of Gregs input on thicker foils.
No, that’s perfect Kazuma, thank you for that!
Kazuma,
Curious about weight of boards…different riders, different preferences? Do riders have preferred designs made with different weights?
Etc…?
Thanks for your generous posts!
Cheers, roger
kazuma
great stuff outside the square is where it allways comes from.
for years i have worked on thicker foils and apreciate your thoughts on that.
my current stuff in G/10–wood combo are 9 ml before foil with machined base for futures or fcs
you want to test some yell out
pics are twin template in silky oak G/10 combo
and carbon epoxy hand lay up hand foiled futures base
GOLD
Roger, I think the area of ultra big wave boards is wide open for change. Most boards/fins work fine in 30’ and below, catch a 35’ wave and things are night and day different. Once your equipment hits the limit, every surfer tries to use common board theory to update the equipment. Like I was saying earlier, what we know and believe could (probably) take you in the wrong direction. The question you ask about board weight? We haven’t hit a limit on that yet. Once up to speed, a 40lb board feels like nothing under your feet. I don’t know what that answer is but I am sure we will be shocked at what is next.
Matt
You guys are fortunate to have this kind of info shared by someone like Matt Kinoshita . His factory is right up the cane road from Jaws and he knows every dedicated Jaws charger young or old. He also shapes the best pro level shortboards in the 808. Lowel
Eh Lowell…
Ya just gotta dig what Matt is layin’ down.
Down side is more to do with the “Locals”…
I (and my local buds )really bummed on dis…
???
It was about locals being prohibited from watching the surfing
Well that’s just wonderful. But it doesn’t have much if anything to do with all the great info that Matt is handing out on Peahi Guns and fins. I was making reference to those tidbits and details not some fake Pidgin and side show. Da.
That is a serious wave…
Was just watching a paddle in session and WOW.
https://www.youtube.com/watch?v=XpnsQ745kOE
This video shows that little foibles have BIG consequence so little design flaws exacerbate this…
Bump…