Actually from the one person who has been running the tweecer it's somewat limited in what it can do. IE: it can't even raise the rev. limiter. I think it's a limit as to what banks it can modify. The Mafterburner products are advancing quick but the longer you can hold out the more features you are going to get wrapped up into one product down the road. Just do the chip, my JMS mail order chip seems to be making more power then any other bolton cobra so he did something right in the tune. All be it, it took three try's but I kept changing the combo slightly on him as well.