ELP..saw them in 1974 preforming the Brain Salad Surgery show at Wembley, Carl Palmer had a Stainless steel drum kit made by British Steel, when he asked what thickness of shells he wanted he said 1/4..consequently it weighed about 5 tons and had to have a reinforced plinth for it to stand on plus his tympans, church bell and the huge chinese gong..70's excess rock eh??