{HEAD ~ A spline cord positioner} is then displaced to {TAIL ~ a predetermined position} on one of the side members of the frame 
is displaced to
{ HEAD ~ A spline cord positioner } is then displaced to { TAIL ~ a predetermined position } on one of the side members of the frame
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH