a front stop mechanism disposed downstream from the input section and mounted to the front stop support plate, wherein translation of the front stop support plate along {TAIL ~ a general direction} of the material flow path varies a distance between {HEAD ~ the front stop mechanism} and the input section; and 
a front stop mechanism disposed downstream from the input section and mounted to the front stop support plate , wherein translation of the front stop support plate along { TAIL ~ a general direction } of the material flow path varies a distance between { HEAD ~ the front stop mechanism } and the input section ; 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH