Since I have an LLY, if I get the Edge CTS I do NOT have to install a DSP5 switch. Is that correct? So that means no wires going to the ECM? Everything is done through the OBD2 port correct? I'm wanting to go ahead and get EFI live tuning 5 tunes and am reading up as much as I can on it and have asked a few sponsers questions and have been told they will get back to me but still haven't.