A stack is cut out so that the pins on the packages and {HEAD ~ one edge} of the grids are flush with faces of {TAIL ~ the stack}  
A stack is cut out so that the pins on the packages and { HEAD ~ one edge } of the grids are flush with faces of { TAIL ~ the stack }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH