Select S11 33cm
Bought in August 2013 2nd hand via the internet together with myS11 35cm.
I have had SL7/S07 fins, delicious reliable fins for a few years now, the S11 is an improvement on the S07.
Not enough to say much about seems a little softer than the S07.
I bought an S10 33cm, am more of the S10 than the S07/S11, so it sold