... meant to give feedback a lot earlier. So...
I took the Boxster out to the local track High Plains Raceway on a square setup.
The car felt well balanced. The front was planted and the rear was easy to rotate.
I'm stil using the stock sway bar, so the rear bar is disconnected. Even so, the rear is a bit too tail happy if there is any surface bump under trailbraking. ...for my skill level anyway.
I have some other springs I'll be trying (600lbs/in F and 700R to replace the ~900F and ~1000R)
I was on very old R-S3s an corded two of them by mid day. Having a staggered setup definitely helped then
A couple of guys that race Spec Boxsters were out there and their choice is square.