Hogg88 - Yes, I read the Certificate, but as I mentioned above, I found it quite strange that it was exactly the same info as running in a brand new ENGINE - ie 'bottom end' bits like pistons etc. My mate from the Mini Cooper Register didn't seem to think this applied to fitting the kit to an already run-in engine, and that wasn't the info he got from the JCW Technician - who booted it on the post-fitting test run (see above).

I'm taking it fairly gently, and in the main, have kept it below 4,500 rpm, but I have buzzed it up to 6,000-ish a couple of times just to see how it goes... I'd like to get a definitive answer on this. The roads are so crappy just now that it's probably a good idea to back off a bit anyway.

A Convertible? With my exhaust I'd be DEAF! Drove to Dealer to pick up my old seats yesterday and had the back seats folded down - sounded like a 'Nascar' race/War was going on in the back!