{TAIL ~ A tubular support shaft} 50 is fixedly attached to the first side wall 14 of the housing 12 and extends substantially between {HEAD ~ first 14 and second 16 side walls}  
{ TAIL ~ A tubular support shaft } 50 is fixedly attached to the first side wall 14 of the housing 12 and extends substantially between { HEAD ~ first 14 and second 16 side walls }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH