I worked in engineering all my life,I can read from a rule if my work was within a quarter of a millimetre tolerance,I had a supervisor telling me that I couldn't do that with a rule,I told him to go and check my work with a digital vernier,he came back shaking his head saying how the hell could I get something within 0.1mm with a rule,I believe the metal needs tapering from the barb to a point 2/3mm from the point,so taking half the metal he did off should barely weaken the hook at all and certainly not in a fish losing sense....