I'm very interested in Chester Bennington's vocal technique, that he uses to emulate scream, though he's not. Or, at least that's what I read about it a long time ago. That he wasn't screaming, but instead controlling his voice to a point of slight overdrive and breakup. This is what I wish to achieve, because when I scream, I can tell it's not doing any good to my vocal chords, so I'm looking to try and copy the technique so I can save my voice and have a great sound.

Yes I do use my Diaphragm to scream.
I got some good guitars, yo.