I have a 04.5 short box cc nv5600 with a con ofe clutch. I want a programer that will give better off the line and mid range. Most of my driving is running empty mixed driving. I do tow heavy short runs usaly 20000-25000lbs. off the pintle hitch. I am now building the off road capability of the truck. I like the reviews of the smarty but want egt, boost display and more control of power out put. For that reason I am considering tst cr49. My real question is how dose this work compared to a smarty? Is it a good box on it's own?