You can cut the cockpit opening to any size you want. I made mine a little smaller to look better. Mine terminates just at the windscreen. Pilots come in different sizes, and often a set of tin snips or aircraft shears were used to customize the size of the opening. My Dad and Grandfather were both little dust blowers, and the family Waco had a small opening. I've seen some that accomodate those of us who tip the scales at over 200 lbs.

Bill, Waco Brother #1