{HEAD ~ An adjustable weight} is provided to control {TAIL ~ the force} exerted upon a signature stack during operation 
{ HEAD ~ An adjustable weight } is provided to control { TAIL ~ the force } exerted upon a signature stack during operation
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH