Bottom panel 27 a is rotated 90 degrees inward about fold line 41 and {TAIL ~ bottom tab} 29 is inserted under {HEAD ~ bottom panel} 27 b  
Bottom panel 27 a is rotated 90 degrees inward about fold line 41 and { TAIL ~ bottom tab } 29 is inserted under { HEAD ~ bottom panel } 27 b
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH