So the car is finished bar a good clean up before IVA. Had another look at the tracking and the self centering this afternoon and it turned out the tracking was well out. Whoops. When I set it the first time well tried to the youngest doughter jumped it and turned the wheel and I thought it I put it back to centre. Turned out it wasn't. Any way re set it all took it for a drive down the roads and it now "shows sings of self centering".
https://www.flickr.com/photos/124541083@N02/