When your front facing bedknives on jacs it's a good idea to keep dubbing the leading end of the bedknive . I just give a light touch with the 4.5 handheld grinder .
Otherwise this might happen . The dub will ( help ) deflect the reel in... instead of catching it and peeling up a bedknife when hitting an object like a raised sprinkler . I've seen this pictured and posted often .