The ct9b's on the glanza seem alot less prone to boost creep that the ep82 ct9a well thats my experience. As ivan says an aftermarket computer i really the best way to go but you have to decide how far you plan to take your tune you can soon spend £50-£75 on an fcd and the same again if not more on a RRFPR this will be wasted money if at the end of the day 6 months down the line you go to an aftermarket computer Simon