Top surface 14 and {HEAD ~ bottom surface} 16 are flat to {TAIL ~ about 0.001″ accuracy} so as not to degrade a spirit levels leveling accuracy 
are flat to
Top surface 14 and { HEAD ~ bottom surface } 16 are flat to { TAIL ~ about 0.001″ accuracy } so as not to degrade a spirit levels leveling accuracy
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH