I got my brother to buy the Smarty for his 06 6speed, so I did the software update (2. 08a moderate). I set my Banks Six Gun with speedloader to stock and loaded the level 5 software on my truck. Well now I see why everyone loves thier Smarty's, it will put a huge grin on your face. So I think the Six Gun is going to have to go soon, the Six Gun is a good product and is a low impact power adder, the truck doesn't get too stressed and it runs very smooth on all settings. One thing is that I live in Los Angeles which already has a pretty bad smog problem and I was dumping alot of smoke anytime I punched it even a little, I only tried level 3 and 5 and both were leaving some decent size clouds in the rearview, I would feel a little guilty polluting as much as 20 Toyota Priuses. Also the EGT's were hotter than with the banks, I was hitting 1300 quite easily. I am wondering if you guys think the smarty is good for a truck that is a daily driver, I rarely tow and have around 600lbs in the bed most of the time, I have done intake and exhaust mods and an egt gauge and that is all I plan on doing, I can't really afford to have the truck break down due to overstressing the drivetrain, also any discussion about the pros and cons of leaving clouds of diesel smoke anytime you punch it, thanks.