{TAIL ~ a third fastener} for {HEAD ~ fastening} between said first end portion and said roller frame assembly 
{ TAIL ~ a third fastener } for { HEAD ~ fastening } between said first end portion and said roller frame assembly
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH