I was talking to Will Sunnocks about this a while back.
My memories of the conversation are thus
Will was saying that there appears to be a "tip" point where the Capricorn goes from bows-up "sort of planing" down wind going like stink, to a bows down and then pitchpole mode. We (Will+crew) are not 100% sure where this point always is, but we are learning when to back off.
I would say that simply ther Capricorn behaves very slightly differently at a critical point down wind, and people just needed to learn to work out where this point is.
