I have a camp chef 90 three burner and just bought a two burner griddle for it. It seems to be made to fit with the stove grill top removed just sitting on the rails, but then I have no support for the third burner. I don't see a single burner grill top offered for this stove it so looks like I will have to make one or use the griddle sitting on top of the stove top. How do others deal with the griddle?