The guide member is held in position by a column support between {HEAD ~ the housing} and the upper side of {TAIL ~ the guide} 
The guide member is held in position by a column support between { HEAD ~ the housing } and the upper side of { TAIL ~ the guide }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL