{HEAD ~ Stationary shafts} are mounted to {TAIL ~ the roller frame assembly} and rotationally support the idler wheel and guide rollers 
are mounted to
{ HEAD ~ Stationary shafts } are mounted to { TAIL ~ the roller frame assembly } and rotationally support the idler wheel and guide rollers
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH