{HEAD ~ A distraction screw} is mounted through {TAIL ~ the cylinder} and with one end resting on the chamber 
is mounted through
{ HEAD ~ A distraction screw } is mounted through { TAIL ~ the cylinder } and with one end resting on the chamber
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH