The way we tune is as follows, we flash a pcm with your vin, this applies a new OS and GM's latest fixes and updates, then we read it, then save it, I edit it, then it's loaded back on the pcm.
Jonathan and Melissa will doing most of it, the only step I will do is the actual editing "tuning" it. Everything else is very easy to do.
So, foroever and ever, I'll be the only one tuning a pcm.
hope this helps to clarify things.
allen