An elongated and spring biased adjustment bar exhibits a plurality of spaced apart apertures defined along its length and is secured in {HEAD ~ axially displaceable fashion} relative to and through {TAIL ~ the housing} 
An elongated and spring biased adjustment bar exhibits a plurality of spaced apart apertures defined along its length and is secured in { HEAD ~ axially displaceable fashion } relative to and through { TAIL ~ the housing }
OTH OTH OTH OTH 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 REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL