In {HEAD ~ the upright position}, {TAIL ~ the pivotable brace members} are aligned and the telescopic brace members would be extended to their maximum 
In { HEAD ~ the upright position } , { TAIL ~ the pivotable brace members } are aligned and the telescopic brace members would be extended to their maximum
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH