I want to get a Nelson tune done and cant wait for wife's warranty to run out. Can I just buy a spare already tuned ECM from him and save the original. If so how much would that cost me. Feel free to PM or chime in Allen. One other question...after reading on Nelson's site, u can get a more aggressive tune if you r willing to run 91 octane. Can you put that into additional HP numbers or can someone that has experience with both give some idea of how much you gain from doing so? Thanks