The third arm has at least one resiliently deformable lobe section between {HEAD ~ its distal and proximal ends} to allow movement of the proximal end relative to the distal end of {TAIL ~ the third arm} 
The third arm has at least one resiliently deformable lobe section between { HEAD ~ its distal and proximal ends } to allow movement of the proximal end relative to the distal end of { TAIL ~ the third arm }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL