I only take to 220grit before I fit the guard or spacer or whatever. Just so I know everything is smooth and flat so I know there wont be any heavy grinding material removal after the guard is fitI'm trying to sort out the order of operations. I don't want to go too far because I'm excited about the build and realize I should have done another step first. Should the blade be complete before filing and fitting up the spacers and handle? I should probably ask this question.