I have a 85 N6 with a straw spreader that looks like a oversized chaf spreader.My wheat ran close to 50 bu and the spreader worked fabulously. I farm west of Vegreville ,AB. The drive for the straw spreader comes from the accelerator rolls drive on the lH side of the machine ,right under the unload auger. It looks to be factory built but there is no name tag on it. I have also seen similar spreaders on other machines so it is not a homemade unit. Hope this helps.