What kind of Yoko's will you be getting next Jon and are you using the T1r's ?
I'm using the Eagle F1's and it would need to be a very good tyre to replace them.
I'm in Penicuik at my mates regularly, Royal Terrace i think. He drives a Red Classic (not into the Scooby scene though).
There seems to be a few nice cars around your way.
I'll keep an eye out for ya bud.
Frank