To those who don't seem to get what spiral vee is. Well, it's a panel vee with concaves through the vee panels. Atleast - that's what it is to me!? And Greg Griffin's term he used is well known as "spiral vee." It's been a well known term for many yrs now. Maybe it used to be called concaved vee for all i know?Maybe if some of you would get off swaylocks and learn about REAL surfboard Shaping and design - you'd know... No reason to disrespect - Greg. Btw-Greg has brought a LOT of invaluable lessons about board Shaping here if you listen.-Jim Hey - Beerfan do you mind keeping your opinion to yourself? Hey, sgo re-read what - Greg Griffin's take about it. He actually was there when dub concaves were developed.FYI - I'm still learning how to shape a viable dub concave myself. Mine almost acts like it's got a looseness factor happening when waves hit the 3' mark? Good or bad- they definitely add to the fun factor!? Upfront - i shaped my first dubs inside the center of my vee panels....but deep part i set right under my front twins. But i let mine carry a bit forward my fins at front. It's sorta looser than i expected. But i think you do want the deepest part under fins, and yes the concaves fade out at the ends , but i think the vee panels carry as a panel vee. Now i think it's a spiral vee, but i just call it concave vee myself FWIW. sammy - why don't you get back to skateboard n kiddo!;) It's more than what you know - beerbong! Atleast i know how to shape a mean board w skill100!;) and i cant even do a cut out of toob yet! Can you teach me how to ride that monstrosity you scrubbed out? Question:do it push water like a snow plow!?:D Oahushaper- i am not 100% certain if I'm doing mine as authentic as it might be? I geuss i went off w my surform when i experimented w dubs. But what i did was: sand in subtle dubs ahead of fins....and through the fins where it bowled sorta deeper at 3/16"...or less. No i didn't really know what i was doing- i just tried it. Ace - i too just did a shallow panel vee.i cut it w planer this time.