FYI, the newer ones with webbing still get rootballs and rocks stuck in them. Perhaps it isn't as bad, but they still do. I'm not sure how it affects performance though. We're running one per row and like what they are doing. Thinking about going two next year. My concern is bearing life. Have one that was loose at 20 acres on that row. A couple more I'm going to tear apart and clean (possibly rebuild) because the zerks came out and they got dirt in them.