Did u find it helped feed smoother ( less thumping) in tough conditions then the oem accelerator in your 9770? I have precision rasp bars and it thumps in tough lentils real bad not sure if it the rotor or feed accelerator?Thanks farmerjones, I cleaned mine out today, hard work at my age of 78. It
was really badly out of balance, I can't tolerate the thumping.
On my 9770 I had both the discharge beater and feed accelerator replaced
with the totally enclosed ones from Mike Ellingson's Precision Farm Parts
in Sherwood ND, if I keep doing custom work the S680 will get them too.