The gyroscope is mounted within {HEAD ~ the housing}, e.g., in {TAIL ~ the handle portion} 
in
The gyroscope is mounted within { HEAD ~ the housing } , e.g. , in { TAIL ~ the handle portion }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL