Finally getting serious!

[KingJL]

My name is J. L. King and currently reside in east Tennessee. I have followed Bill for some time now (since when he was in Ashville, NC area) and was the only tuner that I trusted for the old 7.3's. Now that I have moved to a 2008 6.4 (Gosh I miss my 00 7.3 w/6sp) and put on 22,000 mi, it is time to get some improvements.

I have an 08 6.4 F350 XLT CC DWR 4.10 and half the time is spent towing my 36 ft 15,000lb DRV Select Suites 5th wheel RV. I am trying to decide whether to get the Edge Juice w/Attitude or the Gryphon. I am looking for Bill's guidance on that. Which ever is decided, I am going to do something in the next couple of weeks.

What I am looking for is some more economy @~2000 RPM (especially towing the 5th wheel, even 1 mpg would be welcomed).