In at least one example, {HEAD ~ the base} has {TAIL ~ polygonal guide holes} through which the stems extend from the base in the extended positions 
has
In at least one example , { HEAD ~ the base } has { TAIL ~ polygonal guide holes } through which the stems extend from the base in the extended positions
OTH OTH OTH 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