Good choice on the p-torque front dude, My mate does evolution chips remaps, what happenes is he goes round and reads the files out of the ecu, sends them to evolution chips and they send them back with the map applied and he writes them to the vehicle, at p-torque he will vag-com the car, dyno it, map it, dyno it so you have a better chance of knowing if something is a miss, plus if you have a concern you can easily contact him and get his advice.