so I contacted a local dyno shop to ask about their dyno tuning services. I was told that I either would have to buy a DiabloSport Chip or a DiabloSport Predator and then they tune the car with it on the dyno. They quoted me $200 for the dyno tune. So I have to pay $399 for the DSP and $200 for them to use it on the dyno and tune my car? Is that right? I've never been on a dyno before or been around people who tune cars so I figured I'd ask. I plan to put a Accufab 75mm TB and plenum before I go also. What kinda gains should I expect from the tune with that plus my setup in my sig?