Meh, its not illegal to have a cts....looking at your phone while.driving on.a.road.here is a sure ticket....I'm kind of in the same boat but feel like just buying an egt gauge since Torque has the ability to do everything else I want. Will need to get a boost gauge if I upgrade the injectors though as the MAP sensor will be maxed out. I have been successful in scanning and clearing codes on my truck using Cargauge Pro. Also successfully performed buzz test and CCT with it too. It is real hard for me to justify over 400 dollars just to see EGT's and do other things that I can already do with my phone.