Don Manns Thanks for posting your well design charco unit. I am trying too picture your air nozel. If i am seeing the design properly, your air is introduced down in below your rotateing unit, not sure the name of the rotateing unit with what looks like air hole in center.? And what is the air nozel, or consuming componet.? Is there a clear page of your full nozel and grate area, is the grate the space between the rotater? And what is the metal beside the rotater made out of.? Thanks Don.