{TAIL ~ The chain guide} 50 is secured by {HEAD ~ a support} 52 to the rail 40 
{ TAIL ~ The chain guide } 50 is secured by { HEAD ~ a support } 52 to the rail 40
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH