{TAIL ~ The instrument} 3 wherein said {HEAD ~ rotator} is configured to be manually actuated by a user of said instrument to change said rotational orientation of said opening 
{ TAIL ~ The instrument } 3 wherein said { HEAD ~ rotator } is configured to be manually actuated by a user of said instrument to change said rotational orientation of said opening
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH