I havent had an S3. But ive just bought an RS3 8p which will be having APR software on Thursday. It is reassuringly expensive and there are cheaper options but the fact Ive had APR software on my previous 4 VAG cars (Mk4 Golf 1.8t, Mk4 Golf 25th Anniversary 1.8t, Mk5 Golf GTI, Mk6 Golf R) I...