I have a 07 cummins. Love my efi autocal. Just put in my socal swith. Whats the difference in the pre release and public release on the software? Also how do i update my autocal. What do i do first. Assuming put the truck on the stock tune with the autocal then what? Searched on the site but couldnt find anything to tell me the step. Sorry i am new to efi. Can someone point me in the right direction.