Many thanks to the kind folks at surfdome.com who sent me the above fin, which is out of the Dolphin natural glass flex series. You can literally twist the tip to almost 45 degrees, so I am curious of how this will feel. This is the second fin out of the series I have used, and whilst it almost looks plastic, the 9" version was amazing. Its hard to know how much drive comes from the fin, until you put the wrong one in. Hopefully I can get some success with testing this 8" version in the Andreini Hull I have my eye on. Update to follow, but right now its flat and raining !