I know you're not trying to put me off, and I appreciate the advice! I picked up an '05 STI with Prodrive performance pack - the car is immaculate and I had a blast driving it back from Wales today!
There are a couple things I want to do with the car... CarPlay (still has the original radio), upgraded speakers, better immobiliser and I also need to get in contact with Andy Carr (who mapped the car previously) to try to get him to explain how one of the anti-lag/launch control (?) switches work.
Also, my car came without the manual... do you know where I could find a Type UK owners manual online? Looked for a pdf but can't find any for Type UKs.