I know someone who recently hung a Lyc IO360A1A on his vintage Mooney. After reading a bit here and there on the internets, he learned that he might improve airflow over his #3 cylinder by wedging a small piece of baffle seal material between the baffle wall and the innermost cylinder wall. Test flights have shown impressive results. #3 is still the hottest in climb, but only by a small margin, and #2 is now the hottest in cruise.  He is very pleased with the outcome and thought it may be of val