The legs each has a stop engaged with {HEAD ~ the extensions} for retaining {TAIL ~ the plate} to the base 
for retaining
The legs each has a stop engaged with { HEAD ~ the extensions } for retaining { TAIL ~ the plate } to the base
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH