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