The combination 19 wherein said means for adjustably positioning comprises {TAIL ~ a mounting bracket} mounted to said {HEAD ~ mounting assembly} 
The combination 19 wherein said means for adjustably positioning comprises { TAIL ~ a mounting bracket } mounted to said { HEAD ~ mounting assembly }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD