A system 10 wherein said second support defines a slot of predetermined dimensions therein for removably receiving {TAIL ~ said second hinge side} within {HEAD ~ said slot} 
A system 10 wherein said second support defines a slot of predetermined dimensions therein for removably receiving { TAIL ~ said second hinge side } within { HEAD ~ said slot }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD