So it becomes a laborious process of taking out the reed plate, filing or scratching a bit, then putting it back, measuring, taking it out again, filing or scratching again... etc. Also, some reeds may respond better when "upside down" which is why you see a mix of directions. Some of the highest pitched reeds may have such difficulty to start that a bit of an air leak is needed to help them out. It can be tricky to pierce the right size of hole (which I do in the wax) to provide just the right tiny leak so the note starts quickly.