A groove 150 is formed into {TAIL ~ the sidewall} of {HEAD ~ the housing} 20 for receiving a slider member 152, which is rigidly mounted to the carriage member 148 
A groove 150 is formed into { TAIL ~ the sidewall } of { HEAD ~ the housing } 20 for receiving a slider member 152 , which is rigidly mounted to the carriage member 148
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH