I think the part that really fascinated me was the point made about the reduced dust.  In a normal screw elevator there are grind points where the material is trying to fall back down to the previous space,  on start up even if you have enough material to fill the screw you will have some that leads the rest, some that can fall back.  If you set the screw anything other than vertical you'll have pockets of product in each thread of the screw, leaving large air pockets and making a point for the product to impact other product... all creating dust....<br><br>In this the only real grind point is all the way at the bottom.  the scoops are the largest source of friction against the product, keeping most of the dust in the stuff all the way at the bottom.<br><br>It really is absolutely brilliant,(reply>), Well said.