MorningBird said..
For comparison the S&S34, depending on its fitout, has an AVS of between 135 to 145 degrees.

With a thumping great ballast/displacement ratio of 50% you would expect that. At 145 degrees the mast, rig and sails are well and truly "in the drink". The keel of an S&S 34 is never going to break off, so as long as she don't fill up with water, she gonna come back up again.
That is the beauty of those late 60s early 70s IOR wine glass designs.
The design progression is exampled in the Peterson designs of the late 70s early 80s with the U shaped hull with bolted on keels. Provided the keel is sister bolted and the scantlings around the keel are sufficiently robust, they are as equally safe and dependable as the S&S 34 type design though faster as they should be.
The S&S 34 is designed as a 3/4 tonner IOR and the Peterson 30 is designed as a 1/2 tonner IOR. I would love to line one of each up in a race.
What about this one southace?? I reckon it would sail better than the Jenneau and it has got a WASHING MACHINE which the Jennea does not have.
http://www.boatpoint.com.au/boats-for-sale/boatdetails.aspx?R=16630612&Silo=Stock&Vertical=Boat&Ridx=3&eapi=2It is up for auction Sunday 23rd March at Runnaway bay Marina. Could be a bargain to be had here.