In a disclosed and pictured dunnage embodiment, {HEAD ~ the machine} includes a hollow shaft rotatably mounted on {TAIL ~ a frame} 
In a disclosed and pictured dunnage embodiment , { HEAD ~ the machine } includes a hollow shaft rotatably mounted on { TAIL ~ a frame }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL