I've used them a couple of times when space was an issue. When I foiled, I stacked them parcially overlaying one another in the foil. Worked fine.
Big BarBChef built in to the Outdoor Kitchen, Weber kettle, 1 UDS, Little Chief Electric, 2 Propane Fish Cookers/Turkey Fryers,
a swinging grate over my Fire pit, Big Pig Cooker, SJS.
"Nice talkin' to ya"