Hey Raggy, tuning is a very personal thing and a very variable thing. Depending on what you expect the board to do you'll change footstrap settings and with the s-type you can even change the amount of straps from 4 to 3. Also you need to look at what sails you're sailing in what conditions with which fins. Then you need to look at you're level of expertise to judge how you want your board to be tuned. But as a good average one could say: go for the standard settings.
Haiko, AKA crazychemical