http://ozreport.com/forum/viewtopic.php?t=10475&start=3

I've spent a lot of time thinking about glider sizes and have competed on every size from Moyes (3, 3.5, 4, 4.5, 5) and yet I can't say I've made up my mind on the best size for me (78kg bare). I do notice slight changes in my flying style depending on the size I'm flying but some of that is due to the particular setup that I'm trying out. Mostly, I just try to take advantage of the strengths of the size/setup and minimize losses from its weaknesses.

Overall this seems to make the size I'm flying pretty independent of my score at a competition or my chances of staying up on a light day. For example, a bigger glider might float better but I can work closer to the trees in a small glider.

However... from a pure performance perspective, after lots of tuning, test flying and geek sessions on my computer, I have come to a simple conclusion.

Span = Performance