That sounds super-encouraging! I am a stickler for maintenance, and do everything I can myself. I'll run it with the EPA-Compliant GDE tune until I run out of 3-year/100K warranty on the new crate, then I will find a shop that can help me delete as much of that nonsense as possible.TX with a GDE EGR off tune & T6 my crate went 423k with hard service life. EGR Cooler delete to remove the low coolant risk I bet you are good well past 300k. Will stay tuned for your progress.