Go to the tweecer forums and find a file similar to your setup so you have a good base tune to start with. then do your fine tuning fom there.If it is used you will hace to clean the connector really, really, really, really, really, really good with some rubbing alcohol. If it looks tarnished you can also use a pencil eraser. But do it gently. Also did I mention to clean the port really, really well. If you don't you will be pulling your hair out thinking you bought a piece of crap or that someone sold you a burnt out one. There is a big learning curve and you will need patience. I can't wait till spring to get tuning again.