Can someone shed some light on a situation that I have going on. I bought a pick up 6 years ago that has dsp5 and the tuning to go with it. since that time I have owned a couple of other duramaxs, bought the v2 and installed tunes. I recently bought a cts2 for my 05 lly. the tunes that are o the truck came from some guy that I am never going to find, although I know that they are duramaxtuners tunes. I went in to switch the dsp5 from hardwired to serial. After roughly 6 hours of unplugging stuff I finally got everything to go like it should with one hiccup. EFI wants me to buy a new license for a vehicle that already has efi live tuning on it. Am I missing something? Or do I have to spend 125 dollars on a new license just to change my dsp5 from hardwired to serial? Because that is a rip off if that is the case.....any info would be greatly appreciated.