Continued fitting of cowl halves to engine and adjusting spacing of cowl parts. When satisfied with fit of parts, marked rivet lines for upper cowl half hinges. Then clamped and drilled out upper cowl half hinges, deburred and clecoed in place for drilling of lower cowl half hinge. Marked rivets for lower cowl half hinge, drilled and deburred. Then countersunk fiberglass for upper cowl half hinge. Also began work on final fitting of front portion of cowl halves to get desired fit. Still a ways to go on the cowls!