By moving the point of securing the handholds along the length of the arcuate guide plate, the user can re position the upper ends of the handholds from {HEAD ~ a location} above {TAIL ~ the user station} to a position behind the user station 
above
By moving the point of securing the handholds along the length of the arcuate guide plate , the user can re position the upper ends of the handholds from { HEAD ~ a location } above { TAIL ~ the user station } to a position behind the user station
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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