I did two passes, trying to move the head of my denominator 2 approx 1cm every 3 seconds. So that gives me in total roughly 6 seconds per square centimeter.
That is 6 * 25 * 12 = 1800 holes. Unfortunately, as you see on the pictures it does not feel evenly spread the wounding pattern
View attachment 137583 View attachment 137584 View attachment 137585