I have a 2012 Cummins 6.7 deleted and tuned with Efi live and a csp5 switch. It has been deleted and tuned with efilive and a csp5 switch. The shop that deleted it has since gone out of business. Tunes 1,2,3,4, and 5 have no difference in power. That being said, can I buy an efilive autocal, tunes from a reputable company like CTT and tune the truck myself ? I’ve looked for link and help before posting. Any advice is greatly appreciated or guidance in the right direction. Like Efi live install info for dummies .....