We will probably do some testing with less filler strips(especially if beans get down extremely dry),but when we originally put them in, we saw seed quality much improved(assume trash cushions the seed as threshed),and I expect we run very little returns this way. Also, when starting out too early in harvest, it does a perfect job with over 20% beans(if you bin air dry beans). I am assuming that without conventional Gleaner sep grate, we must be sure that all threshing has to be done at concave. Time will tell.