Thought I might as well reignite this thread to provide an update. After some deliberating In the end I decided to take the Diff out, and it is presently with R&R. But it unfortunately appears that Quaife don't presently have stock of the required part. Additionally, having read the numerous posts on "LSD" and considering my liking of track days - Im leaning towards swapping the ATB out for a TracSport (though need to find some funds). If I do, I'll be selling a rebuilt ATB Diff, hence please let me know if this is of interest?