Todd, you deleted your question, but I'll go ahead and answer it as best I can here.
I use classical guitar vibrato, which is achieved not by bending the string, but by using a "push/pull" action with the string. Fret a note, and then "push" in the direction of the string, towards the bridge. That actually slightly lowers the tension of the string, sending the note flat. Using the same axis (that of the string), "pull" the string tighter back towards the nut. This raises the pitch.