Check this guy out BMEP The owners name is Brian. I bought a used wide band A/F meter from him to tune my car. I was also looking in to the Autronic stand alone fuel system that they sell. If you purchase the Autronic wide band A/F meter with their fuel system, the system will tune 90% of the programming by it's self. The other 10% are inputting the basic parameters you would have to do and if needed, with the help of Brain. I was told it's realy not hard to do.