{HEAD ~ The editing wheel} is mounted on {TAIL ~ a shaft member} and can be actuated to rotate thereon via suitable actuating means 
is mounted on
{ HEAD ~ The editing wheel } is mounted on { TAIL ~ a shaft member } and can be actuated to rotate thereon via suitable actuating means
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH