That looks like a 21 SE, which is not what the 21 formula apparently is.
Probably you are right, I'm really not sure.
That custom spinnaker system needs a shorter halyard :P
Based on the last picture we should open a new "how not sail a cat" topic... <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />
