Mapping what engine, in what vehicle, on what management? Road legal or not? Petrol, Diesel, Methanol? Gas?

Karl is indeed very good and I would have no problem recommending him and often do, but would he be happy doing, for example... a 7 litre DAF truck like I did last Monday? Or a Yamaha 2 stroke outboard like we did a few weeks ago? Or the Fastrack tractor James is doing tomorrow? Maybe not.

I think we need much more info to answer your question.