The new iSonic and iSonic Speed 2011 :
==> www.windsurfing44.com/forum/viewtopic.php?f=15&t=2627&start=10
i wonder if starboard would give me a job and then i can go windsurfing every day.
now where have i seen the deck shape before.....
hmm....
They have really reworked the iSonics, I would imagine that when equating to older models that you would work of the width and not the volume Example the 117 would equate to the 121