You don't send anything back with HP tuners. What I meant by Nelson using HP to tune our trucks is that Allen actually uses that program to adjust the parameters within our PCM's. If you get a mail order tune, then you will get an already tuned PCM in the mail and you send your stock PCM back. Nelson already knows what parameters to adjust based upon the mods that you have done to your truck.

It sounds like you are like a lot of people, including myself, in the sense that you don't have the time or willingness to try and do it yourself. I agree with letting the pros do it and probably have it done better than I ever could.

Ask all the questions you want, that's what this site is for!