{HEAD ~ A spring} is disposed interior of the channel and between {TAIL ~ the assembled pivot stump} and housing 
{ HEAD ~ A spring } is disposed interior of the channel and between { TAIL ~ the assembled pivot stump } and housing
HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH