As explained below, such an arrangement facilitates performing alignment and {TAIL ~ height setting} operations at widely spaced blade height positions to increase the accuracy of {HEAD ~ those procedures} 
As explained below , such an arrangement facilitates performing alignment and { TAIL ~ height setting } operations at widely spaced blade height positions to increase the accuracy of { HEAD ~ those procedures }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD