a first fastener for fastening between said first end portion and said roller frame assembly, said first end portion being in contact with said roller frame assembly when said {HEAD ~ mounting cap} is clamped to {TAIL ~ said roller frame assembly} 
a first fastener for fastening between said first end portion and said roller frame assembly , said first end portion being in contact with said roller frame assembly when said { HEAD ~ mounting cap } is clamped to { TAIL ~ said roller frame assembly }
OTH OTH OTH OTH OTH OTH OTH OTH 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 REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL