Bore 37 extends horizontally at {HEAD ~ right angles} to bore 34 in {TAIL ~ top bracket} 30 and accommodates set screw 39 
Bore 37 extends horizontally at { HEAD ~ right angles } to bore 34 in { TAIL ~ top bracket } 30 and accommodates set screw 39
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH