I have one and removed the round center grate portion the first time I used it and never put it back. I keep it in one of my performers which I now dedicate for use with only the vortex, gourmet griddle, or gourmet wok. The center opening also works great for lighting a chimney if you have a gas assist. The small chimney fits in the circle perfect and rests right over the flame, the large one only has a slight tilt due to the handle.