If you've got any of the 2mm matting left over, it's well worth chucking a bit in the spair wheel well. I had a bit of grief with exhaust drone (after fitting a cobra non-res catback) and found that it was ultimately down to the boot floor transmitting the noise into the cabin.
Cheers you two. As for future plans, I made the mistake of having a brief test drive in Abbeys demo car with the Harrop supercharger... So that’s sorely tempting, though a slightly better exchange rate wouldn’t do any harm.