As one of the old goats, I was fortunate? to participate in my junior and senior high school's woodshop programs. The training was at best rudimentary. My understanding on chipbreakers is that the primary reason that they were added to plane irons was to reduce the chatter that was more common with thinner irons. I also am aware that they also "break" the shaving as it exits the mouth. My question concerns the placement of the chipbreaker at the edge of the iron. What is everyone's thoughts on chipbreaker placement and why? Does it much matter