{HEAD ~ The ball} is attached to {TAIL ~ a shaft} which is, in turn, attached to an ultimate support mount 
is attached to
{ HEAD ~ The ball } is attached to { TAIL ~ a shaft } which is , in turn , attached to an ultimate support mount
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH