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