The misalignment means comprises a cavity of predetermined configuration such that {HEAD ~ the insert form cutter} matingly engages {TAIL ~ the cavity} only when in proper cutting orientation 
matingly engages
The misalignment means comprises a cavity of predetermined configuration such that { HEAD ~ the insert form cutter } matingly engages { TAIL ~ the cavity } only when in proper cutting orientation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH