Sorry for the delay getting back to you all to respond to your comments, but as Budster said I popped over to him for a chat a round trip of 38 miles I managed to avoid any puddles to avoid getting the car dirty. The delay was I had to check it still had a clean bottom

I am not going

, just a bit of a clean up as I have done nearly 2K miles through the winter

(more that I suspect some of you do in a summer)

on the holy grail trail of the ECU upgrade by the way it is performing very well. MPG as measured today is a reasonable 28mpg, after 134 miles some of which had some serious blasts of acceleration. The mpg readout is currently showing 31mpg. So the drive to Budster and back was a bit of a bumble.
When I cleaned under the arches and the wheels the other week I greased up the pins, and turned the AVO's up one notch on the front to 5 clicks, what a difference a click makes, I think the pins needed a good grease as it was 800 miles since the last one.
Anyway back to the engine bottom, were's DaveW I am sure he can give me some sensible advice even if you lot can't.