As also illustrated in FIG 2, {TAIL ~ the four arm members} 300 are positioned in {HEAD ~ a slight tilt back position}; however, this is not required 
As also illustrated in FIG 2 , { TAIL ~ the four arm members } 300 are positioned in { HEAD ~ a slight tilt back position } ; however , this is not required
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH