Well... ... I was with my friend the other day lookin for stuff for his dad's 87 GN and we stumbled across a free download-able diagnostic reader (knock meter and warning, rpm's, etc...) and I always wanted to get into doing diagnostic readouts and fuel mapping, but is there any companies that make diagnostic reader programs for computer that u guys have trust in their product? just watchin my self after the vivid racing thing. and saw a local guys evoIII runnin around, his business went under but he still has 4-5 cars he modified with his own parts, it was called "quantum technologies" if I remember right, but it's freakin fast, I hope to get sum pics of it soon cause it's awesum. he had a race team called Q-racing but his evo runs 10's and he's selling his mazda protege... don't know much on it but all of his other work is crazy. thanx