Maybe you should think about what you are saying before you post it as now you are arguing with a previous customer on a public forum telling him that he should have specialist knowledge of exactly how a car should be mapped moonstone as I have no clue how it is done and what should be the correct process all he knows is that he brought the car to you in good faith expecting a quality job to be done If he could map it himself he may have saved himself the cost of a engine rebuild !