My truck is stock except for flopro delete pipe and Smarty. So far I have run it on tune 1 and tune 3 with default settings. Runs fine, smooth, good power etc. I don't like the clatter (sounds like a 6.0 furd) at heavy throttle low rpm's. Nothing wrong with any of it sounds like every other cummins 5.9 or 6.7 with a rail pressure box but I want to get rid of it. Is this timing clatter or is it from the rail pressure? I'm sure I can figure this out on my own but I wondered if anyone had played with it. That might save me some time with the many options the smarty offers. Also anyone want to report egt's on a similar setup/tune. I am waiting for something new to come out in the form of a gauge/screen (not sure on what yet just want to see what comes down the pike).