Never heard of that particular feeder chainIJ What kind of plastic bars does it have and are they what many call the "slats" on the feeder chainIJ Can't imagine a plastic slat holding up to the abuse, but I don't knowIJ Sometimes if the chain jumps time, it will cause the feeder to backfeed. One side of the chain will be ahead of the other side. just place a bolt, 5_8, 3_4 x 1inch on the sprocket which side is behind the other just as the the last gap goes into the chain on the sproket. Turn it over with a wrench and the bolt will ride the chain back intime. Be sure to retrieve the bolt out of the feeder. Other than that, it seems like you have tried some other things that might help. I'm curious to know more about that chain you have, I'd be suspect of it causing your troubleIJ JD