I had a Dobek, and I had an increase in HP when the air/fuel ratio was adjusted correctly. I took it to a local shop to have them fine tune it. The Dyno Operator (shop owner) told me it was a waste of my money. I had it running as well as he would have gotten it. He could have take me for $275 but did the right thing.
I switched to the Cobra Auto tune because I change out pipes (stock, debaffled, and Cobra 2-1), air cleaner (stock, BAK, and Cobra Powerflow) based on my whims. I change elevations riding from my home to my daughters house in CO, and my Dads in ID. Rather than readjust the Dobek, I thought an autotuner would be easier (it is). I am sure a PC-5would work as well. I am just not a die hard PC guy. Therefore, I disagree. Nothing personal. I am sure you have reasons for your statement. My experiences lead me to a different conclusion. Ride safe!
1SG, USA (Retired)