A week ago I used my Overdrive 8.5mē 2008 with good result on my Futura 111.
Futura 111 + overdrive 8.5mē + select rs7 43cm (powerfull lightwind fin)
spot: Dutch lake
I'm quite heavy (95kg ) and tall (1.9m)
It was for me a big test and a good test. Other people where using the isonic 133 with 8.2mē vapors.
Also with my previous s-type's I always used a bigger sail then indicated and it always worked out very good.