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