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The drippings can burn if the drip pan is set directly on the platesetter and give a harsh taste. I use 4 stacks of three pennies at thecorners to create an air space which stop the drippings from burning. Ialso line my drip pan with aluminum foil for easier cleanup.
I usually put the three green feet below my drip pans. It is a little high, but i just trim the drip pan with my tin-snips.