The assembly comprises {HEAD ~ a plurality} of {TAIL ~ first slotted partitions} intersecting with a plurality of second slotted partitions to form a collapsible matrix 
of
The assembly comprises { HEAD ~ a plurality } of { TAIL ~ first slotted partitions } intersecting with a plurality of second slotted partitions to form a collapsible matrix
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH