a grain column through which grain may flow, wherein said grain column includes a left lateral discharge sidewall, a right lateral discharge sidewall, a lower discharge surface and an upper discharge surface which collectively define a discharge opening, said {HEAD ~ lower discharge surface} is spaced apart from {TAIL ~ said upper discharge surface} by a distance equal to D1, and D1≧5.0 inches; and 
is spaced apart from
a grain column through which grain may flow , wherein said grain column includes a left lateral discharge sidewall , a right lateral discharge sidewall , a lower discharge surface and an upper discharge surface which collectively define a discharge opening , said { HEAD ~ lower discharge surface } is spaced apart from { TAIL ~ said upper discharge surface } by a distance equal to D1 , and D1≧5.0 inches ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH