hi Gents i have used Redline several times and have nothing but good things to say he is currently carring out a full engine management install on my twin turbo LSX ultima GTR and i have lots of friends who use him for full race cars with good results! Rich is a very clever bloke who will be honest with everyone. the fact that he is currently booking 3 months in advance and has a motorsport clients list as long as your arm should tell you enough! i know for a fact he does not do mapping on L1,L6,L8 or P8 and will only set it up to a point if there is potential problems that would take up to much time to trace he will try and suggest other options usually stand alone system that he can map and satisfy the customers requirements. hope this helps and please dont judge on one persons experiance which only tells one side of the story.