I ordered a complete NX kit and will be installing it in my car. I have a diablo tuner and can probably get a custom tune emailed to me but I was wondering do I need a chip to have multiple tunes or can the Nitrous tune be used as my daily driver tune aswell. The NX will be turned off at all times unless i go to the track. I saw the SCT eliminator 4 bank chip, which it looks good but is it necessary.