you can end for end edges to get the sharpest edge leading, also shim the brackets in and_or keep the nose bushings tight, if they wear they will always deflect outward increasing the gap over specs, also little weld on tab at top is important, CNH makes 1306207C1 to fix this, a lot of plugging at the top of the snap roll is caused simply by the front or bottom not doing its share of trash handling. If the bottom bracket_pin is worn it should be fixed, I know they are pricey but it contributes to above problems.