Metal Core Wheeles How Do I Scream Like The Metal-core Bands?

How do I scream like the metal-core bands? - metal core wheeles

I have countless online tutorials, but if you follow a "T", I can not get rid of that scratchy throat, or make beautiful sound. Moreover, they are all different and can not head or tail of something else that all the diaphragm.

Can someone to me a fairly detailed tutorial is really good and go to work?