I have a Powermatic 6", long bed jointer. I can easily get the blades adjusted until I tighten them. Tightening invariable moves the knife. I can tighten as slowly and evenly as I want, but the knives always move. The only way I can get them even is to run a diamond sharpener over them. (Powermatic recommends this.) Does anyone know a way to get the knives adjusted without grinding?