A few things: the economy has settled to around 30.6mpg. It did hit a high of 30.8, but in this nice weather I've been using the power a bit more again. The supercharger installation is running very smoothly and I think it likes the cool intake air, which is running at +14 (so 22C today).
The rear tyres are really wearing much faster than the fronts now with the supercharger, it's reminiscent of my old BMW in that respect. I should probably rotate them to even things up a little.
I had a Golf right up my backside this afternoon. Dropped it to 5th and hoofed it. Nope, wasn't losing him so I pulled aside in the next gap. It was a Golf R. Oh well, can't beat them all!