RE: What Starboard for 8.5 + 10 m?
I don't know JM, ThierryP seems to be quite satisfied with the more demanding slalom shapes in the S85 and the iS105, so he might find the extra edge in a straight on slalom shape. Really, at least in my mind, he needs to decide whether the slalom or more formula direction makes the most sense for his style. Personally, the slalom approach seems more viable given his comments. Also, let's not discount the flexibility in different fins to tone down untoward lift characterisitics.