The roller frame assembly includes {TAIL ~ at least one idler wheel} and {HEAD ~ a number} of guide rollers 
The roller frame assembly includes { TAIL ~ at least one idler wheel } and { HEAD ~ a number } of guide rollers
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH