I put a floor tile in mine, but haven't tried it yet. I just happened to have one I couldn't ever use, so I figured I'd try it. I've always read that you should put it directly on the metal flame deflector (as opposed to on the rack itself), but don't cover up the holes on each side.
Interesting idea with the sheet pan, I might try that if the tile doesn't work out.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!