Ok so after loading the custom file and putting some mileage on for the fuel trims and everything to get relearned, I sent Lew a WOT file so he could put the final tweaks on. That one got turned around real quick (like same day) and I got the final file loaded in. Rinse and repeat with about 100-150 miles for everything to relearn the new tune, and I have to say, I am very happy with the results. No more hesitation off idle, crisp power delivery, gears hold a little longer and shifts can be felt but not so hard as to jolt. Getting on it on the highway, this thing just hauls ass. I love it!
The only thing I'm not in love with right now is actually not tuning related, it's the intake. The AFE Momentum GT has a great, throaty, deep, growl to it, but only at very specific RPMs. So, when I get on the throttle, yeah, it sounds great and I love it. When cruising, it's super quiet, you wouldn't even know it's there, and I love that too. However, when cruising and just gently accelerating (like to change lanes or what have you) it's kinda on/off/on/off where it's shifting through and around the audible/not-really-audible RPM range, and it's honestly a bit obnoxious.
Now, the AFE comes with a rubber plug that can be fitted to the bottom of the airbox, it's about 2" x 4" if i recall correctly. I left that plug out because I wanted it as wide open as possible. I'm thinking if I pop that plug in, it may shift the resonance frequencies enough that it isn't so....obnoxious? Will give it a go and report back, gonna have to find the damned thing first though! Lol.