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