hello peoples.... i have been doing a little experimenting on what cowman said... well, he was pretty right. i wanted to do an artificial harmonic on the 15th fret on the high E string. i then started moving around the area where i was picking till i got a prefect squeal. same thing happened with the 17th fret,19th, and 12th. I barely even had to worry about how much thumb i put into the squeal either, i got a perfect sound. i used to be able to maybe do 1 in a hundred maybe even 2hundred tries, now i do em all the time.