No response to my question on Board talk so I'll try here!!

I've been mucking around with fin set up and my board it seems to track better with a 9" center fin and 2 thrusters.In theory 3 fins should hold the nose of the board straighter on the forward stroke (maybe it's how I paddle?). I know it will be a fraction slower, but don't you think the trade off would be worth it. The fastest way to get somewhere is in a straight line, even if you go a bit slower. Also if the board tracks better with 3 fins, but goes slower why not set the thrusters parallel with the center fin to eliminate drag. I think this would be a good set up for someone who wants a good all round board and not interested in pumping it for speed when surfing. I know most fin set ups have already been proven, but sometimes the simplest ideas are overlooked.
90 Mile

G'Day Doggie, Hi 90Mile,

I think fins have only minimal input into overall paddling speed.
My guide formula is;
75% paddler
20% board
3-4% paddle
1-2% fin
=100%

First things first, get yourself bloody fit, and onto a freaking fast board/canoe thing.
Get your technique right, with a high quality paddle.
Then think about fins...

But your fin idea does have merit. But mostly, board design is actually more important. In my opinion.

Rockman, the issue is for slow speed flatwater paddling, not performance surfing with multiple fins. Or at least that was how I answered it.

Also note that JP Surf SUP's have played with parallel thruster sets.