Been driving around for a year and 1 month without my avcs working I only noticed the difference as I had a neutral postion switch that wasnt working when I had the Mapp done off Bob last year and he couldn't put the launch on so I got it replaced when he was up and launch put on drove it home and was like a rocket !!!! I be missed out on a major peer increase its smooth and pulls now.. Andy Kindon told me was cause of the switch I didn't even no this stopped them working if faulty !!