You obviously have no clue how an engine works, do you?
You cannot take "X tune" and modify a bunch of sensor inputs, and expect to get "perfect results". Yes, you might make it to the ballpark...before your car explodes. It is not the proper way of tuning, and I do not endorse any sensor modifier. If you do, you are senseless.
An AFC is the same pile of crap. It is there to correct JWT's "Everybody" settings. What a bunch of crap. You spend tons of money and STILL need a dynotune? Sounds stupid to me. Just get the dynotune in the first place.