A longitudinal sleeve has at least two radially spaced ligament contacting surfaces located in {HEAD ~ lateral opposition} to {TAIL ~ a sleeve inner lumen} 
to
A longitudinal sleeve has at least two radially spaced ligament contacting surfaces located in { HEAD ~ lateral opposition } to { TAIL ~ a sleeve inner lumen }
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 TAIL