Danny - really really appreciate the help mate. Thanks so much. You're a legend!
And I'll definately take you up on your offer of coming over and showing me the tips and tricks.... so are you racing in Northern Ireland often? hehehe.
Thats my problem mate, there isnt anyone I know of in Northern Ireland whos an experienced Schumacher driver (yet!)
Thats not to say they dont exist, but Ive been all over different clubs, and cant find any.
However, some of the guys from Ireland have been really generous and given me some help, so going to grab them at the next race meet and see what they can advise.
Your tip about the diffs feeling "notchy" is exactly how I would descrribe my diffs, and considering I have never replaced the diff balls - I think its time.
Thanks again.

Andrew.