A subject of some real interest. I do just the opposite. I set a single plug towards the rear of an just inside my Forward fins. Much like a Twinzer. I use Rainbow’s Twinzer fins. I would rather use a smaller fin foiled exactly the same as the forward fins , but with only one tab. Lowel
I think Herb said 1 1/8 to 1 1/4 from the fin or rail with same if not a shallower towin and the middle of the outriiger fin lining up with the leadinf edge of the front fin. I guess I could just buy the fins and line it up.
George used to claim that Rusty took the idea of the C5 from one of his boards, but Herb gave me the scoop years ago
I wouldn’t doubt that a bit. I always heard George was a thinker when it came to design. Only thru da “Coconut Wireless” tho. I never met him. Legendary. I don’t think you will find a higher quality fin anywhere. Beautiful to look at. Foiled art. Rainbow is da Kine. Lowel
We went to school with George Ku. He was a year older than Oneula and a cousin of one of our homeboys. That homeboy just happens to be Kekoa Bacalso’s father. I’m sure George had some influnce on Kekoa. George used to be one of the top guys at Sunset and Laniakea. I think his boards work best in powerful waves.
here’s a C5 setup on an older Rusty, about an 8’0. I didn’t have a ruler handy so I stuck my thumb in for reference… and you can calibrate to the size of an FCS plug with a little effort. Toe in for the canard looked parallel to the main fin (to my eye). The cant was greater than the main fin.
George still does a lot of hand shaping. Not sure how much is machined then finished. He messed around with the overseas market a while ago, but I think that’s all in the past. Too bad, he offered my brother and I some really good bro deals on those. George retired from the fire dept a while ago, so I think he has a lot of time for making boards.