Both my cars are not lambda controlled, got the Peugeot through the MOT using a colourtune but I was right at the limits, other car is much more difficult to set up.
Its a handy item to have, makes tuning a lot quicker and more accurate. Got most other tools you can think of, never got round to getting one of these.
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates