A good read Dan, glad you have enjoyed your Zed & are now moving onto bigger & maybe better things
A porsche dealer will have to move the car on to an auction or something, they won`t put a Nissan on the forecourt Zed, GTR or Micra
Wear to the inside of tyres due to negative camber can cause the car to do this, also if the front wheels have positive toe (& negative camber) it will make the car more unstable at higher speeds & can cause it to "tramline"
Did you not get the alignment done a while back Jim?
Are these "Vredestein Ultrac Sessanta's" directional?