I've had great experiences towing with DD2's and an Edge Comp without the 'wire' hooked up- which is the same as the EZ. I just got back from vacation towing my 26 foot travel trailer to Laguna Seca near Carmel and back to Sacramento.
I used just over 1/4 of a tank one way, each way, and averaged over 16. 8 mpg's with this setup. Without a trailer, I get over 20 mpg's. (I got only 13 mpg's max stock)
My EGT's were very low post turbo, about 800 max, usually 600. The only problem I had was that I blew off the lower right turbo hose going up a grade at 32 PSI's. (Embarrassingly just after I smoked past a Ford Powerstroke earlier with hardly any effort at all, only to have him minutes later chug pass me, over on the side of the highway with my hood up and my tools out. You know what he was thinking,. . I know what I'd be thinking

)I put it back on and, guess what?, Found ALL my clamps loose!
Anyway, I highly recommend DD2's with the EZ.
Bob in Sacto
PS: I haven't re-connected the Comp 'wire' to my VP44 because the last VP44 went 'kaput' not long after I did, and it cost me about a grand. But it sure went like a bat out of... , in fact, it would lay rubber as long as I floored it, and never quit until I let up. I just spent over $700 on the cheapest set of tires I could find, and so another reason I'm not going to hook up the 'wire' again
