Thanks for the kind offer....in fact I'm planning to get the exhaust done this Thu all being well. As for the rust, it will be sorted, and it is a tiny area, just on the inside of one rear wheel arch, prob no more than 0.5cm or so. Overall, the bodywork is excellent, and I am very fussy.
Absolutely loving the car.... I took out a work colleague for a quick spin today as he asked so nicely. He's got the new BMW 640D with I think about 315hp and over 450lb torque, so his isn't exactly slow.
Found a nice A road and planted it to overtake a car, quite literally he just started swearing uncontrollably. The C55 is just monstrously fast.
I am still catching myself saying "jeeeesus" under my breath whenever I have the opportunity to open her up. With my old e39M5 it didn't as I recall take that long to get used to the power until it felt "normal"...I guess this happens whatever you drive, but I have to say it may be some time until the C55 feels like this to me.