So, to offer a little distraction from the insoluble PTS conundrum, here is a brief synopsis on my first track day experience:

Positives:

Great traction out of slow corners and stability under heavy braking, amazing front-end grip in faster corners. The stresses and strains of track use don't seem to bother it in any way, very reasonable brake and tyre wear after a total of well over 3 hours spent on track in very warm and humid conditions. 

Negatives:

None really, acceleration is slightly better but overall straight line speed is at best on a par with the base 991 GT3 (due to the aero package), and the nominally increased engine power is not that apparent. So you have to rely on the better traction/speed out of corners and marginally better braking points/higher cornering speed.

Overall, it is a hugely enjoyable track toy, it puts a smile on your faceblush