a second fastener for fastening between said second end portion and said roller frame assembly, said second end portion being spaced apart from {HEAD ~ said roller frame assembly} when said {TAIL ~ mounting cap} is clamped to said roller frame assembly; and 
a second fastener for fastening between said second end portion and said roller frame assembly , said second end portion being spaced apart from { HEAD ~ said roller frame assembly } when said { TAIL ~ mounting cap } is clamped to said roller frame assembly ; and
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 HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH