We put them on our 30' 1020 last fall. What a waste of money :~((. In grass, green stems, or down beans the stems would wrap around them and thrash beans out throwing them every where. 1st day we ran we broke two off. Within a week we had broken 3 more. Ended up taking all but the last 1 off on each end. If doing it again I would only put one on each outer end, those did seem to help a little.