I was working from a different template on this one so I had to decide where to place the fins. I dug into the 'design library' and pulled out my best 3 performing boards. A 1978 Bob Mc Tavish shaped Sky twin fin, a 1980 Mark Richards (designed) twin fin and a 1982 Bob Hurley shaped twin fin. I measured up the fin placements and marked them out on the new board. Interesting to see the difference and the slight change in toe angle.
I took the best of all and went the average.