Just wondered if any of you guys can tell me why this thing is so rough. It works great till it hits the rev limiter. I can't even use the 2-step because it pops and backfires so bad (even flames out the exhaust sometimes). I've tried a new 2-step and it still does it. I've had 2 different 6al boxes in the car. Both act the same. Do you think a Digital 6 would do a better job? I launch at about 6k and shift at 7,600. Any ideas? Thanks all.