I have seen some horror stories with aftermarket spreaders both in price and in related problems. As in the post below I have never seen a real problem created by a OEM Gleaner chaff spreader's job in our area. On one of our 30' 72's we did extend the boards tips , seemed to help a little and customer was satisfied. One can do more with the RH side than the left. AS AN AlTERNATIVE, I do rent out my Mother-in-law ! We equip her with WWI flying goggles and leather helment and put her in a Radio Flyer wagon and tie it to the rear axel with a couple of funeral home fans in each hand.. does a satisfactory job and gives me some revenge.....