We have 35K on GDE tunes. I have SEGR installed, but have disabled it since switching from InMotion to GDE. A GDE tune only opens the EGR in that rare moment when you are at WOT,you momentarily lift off, then jump back to WOT. This protects the turbo from being damaged by overspeeding. Many people could drive for years without creating this condition.

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2005 KJ CRD Ltd Detroit TrueTrac Bilsteins G2 GDE "HOT" ECU GDE TCM "Tow Tune" "euro" TC SEGR Weeks Elbow New HG at 130K ARPs Clean CAT aFe Filter Magnaflow Exhaust EHM Cumminos In-Tank Lift Pump Hayden Fan Clutch Nylon Fan VH Enabled with GDE lower shutoff point Recalibrated Temp Gauge Tekonsha Prodigy Sears P-1 ZDDP