Jack, That is a great looking cook and I remember it well. You are right about the dead zone. When I say "lower" level, I probably mean about half way down because I'll put the breast up fairly high. Do you remember that picture with the chicken cut in half with the breast, backbone, and wings in one piece and the thighs and legs in another piece? The picture had the breast at the top and the leg part placed beneath it. It looked weird but it worked.
Dee