i know that carl replaced luther perkins (no relation, incidentally) as johnny's lead guitarist after luther's untimely (is there such thing as a timely death?) death. carl could imitate luther's "boom chucka" style pretty accurately but you and i heard the difference, i'm sure. i had mistakenly stated that they (carl and luther) were brothers. welp! i stand insurrected. even irishmen can make mistakes, especially if there is nobody handy to pin it on.