How is it?
You are right that fin placement has heaps to do with chosen wave-range..as so many things are, it's up to the individual.
And Kyle's boards are way loose due, not to the rail fin dimension, but his centre fin..about 4" forward than Farrer for example. BUT, Kyle then uses a Merrick or Slater in the centre whereas Simon will use a GX..so Kyle uses additional area to compensate for the more forward position of the fin.
In planshapes for example, I wanted to illustrate that if you rode a 5' 10" I don't beleive there was a lot of advantage adding only two inches to create 'a gun'..I'm sure you've seen Kyle's favourite..it's seven-o and his shortboard is 5' 8"..big incremental difference. But at the World's in 2002..he had three other boards INBETWEEN those dimensions.
Simon also has 12" seperating his shortie from his 'gun'..over 4 boards in total.
Now in Sophia's case..and I hope I can be totally politically correct here..Women (generally) don't have the muscle mass of most men. I am assuming also that Sophia hasn't say surfed a kneeboard for over 30 years and she is tall and slim.
Additionally, Women do not surf with the push and power of a lot of men..because Women are far more graceful creatures..they will flow and glide rather than aggressively launch at things..
You are right in all your observations..but if I were shaping for Sophia..I would be targetting a 5" 10" shortie and a semi-gun up to 6' 2"..a 4" differential in overall length. And the length here will translate into outline curve..guns with parallel rails will not work for cutties and direction changes very well..particularly for a fluid, graceful kind of surfer.
Hope it's all good..
And Dan, all roads DO lead to Rome! Go the Thruster, mate
