Thanks Stu, was just about to reply to your email. Ive got hold of a set of blacks on your advice, just considering whether to just order a chip instead of the closed loop, as stated by some replies above, I'am not totally sure it would help as much as I think it would in compariosn to a decent chip from yourselves?

Does closed loop make a major improvement over one your chips for normal town driving? Or for instance can I get 30mpg without the use of closed loop as Id like to go wasted spark too very soon, so wonderig if money is better spent there?

I fully agree and intend to fit it myself then come up for a set up/check over.

Thanks for the help