You are a mad man w/ those fins! Excellent stuff. I have a 5' 8" Hypto, and I've surfed it with Mob's fins. It went well, but was a little loose for my taste. Granted, it was punchy beach break in CR. I have found that the YUs from Futures work really well in that board... good flex, drive, and hold. Smaller thruster fin also means a little more of a tight twinnie feeling. Love it. For the record, I'm 5'10" 153 lbs.