[expat]

Yeah, I think we all know about air pressure so we can move away from this thought...

The castor issue is very interesting - I have no experience in steering and suspension issues so should I send the car to a dealer or porsche experienced shop to check the castor? My car really wants to pull the steering back into a straight line which is really uncomfortable when I'm trying to push it thru a corner...any bump seems to send it back to centre too.
David...if you persist following this issue, please keep this post updated because I think there's a few people with the same thoughts, including me! Have you changed the bushings as suggested by Early_S_Man (I think it was him)?
Cheers
Mark