The curved bats will for sure help, I fought with the same thing for years and last fall (after we were done) I decided I was gonna do something about it.
Had CIH mechanic come out and look over my machine (1680) and he said the main problem is the flat spinners (the part that the bats bolt too) are not wide enough, the material doesn't stay on the spinner long enough to get thrown are enough. So I bit the bullter and ordered the updated spreader kit, it came with wider spinners, curved bats, updated curtain (which I had to modify to fit) longer shafts, and quick couplers. I"ll know here in a few months if it works but for the cost of it it sure better work. lol
good luck
If I could figure out the picture posting I"d upload some for ya.
Had CIH mechanic come out and look over my machine (1680) and he said the main problem is the flat spinners (the part that the bats bolt too) are not wide enough, the material doesn't stay on the spinner long enough to get thrown are enough. So I bit the bullter and ordered the updated spreader kit, it came with wider spinners, curved bats, updated curtain (which I had to modify to fit) longer shafts, and quick couplers. I"ll know here in a few months if it works but for the cost of it it sure better work. lol
good luck
If I could figure out the picture posting I"d upload some for ya.