So what do I get with a new unit? how many dmaxes can I tune? (My dad has one also) can I tune anything in the transmission (allison)? and can I get make a custom message in the DIC like the ones show in someones avatar on here that says TUNED WITH EFILIVE? that would be awesome! I'm gonna buy one of these cause I have been reading alot over the last year or so and have heard of some guys make awesome power and also making some good fuel mileage tunes, also this DSP5 how does this work? does that mean I can switch between 5 different power levels on the fly? I see they are not that expensive for the switch and wiring. also who do I call to speak in person with someone about this, Thankyou in advance guys, Lee