This ensures that {HEAD ~ corners} of {TAIL ~ the insert} and the recess will not interfere with the proper seating of the insert 
of
This ensures that { HEAD ~ corners } of { TAIL ~ the insert } and the recess will not interfere with the proper seating of the insert
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH