{HEAD ~ A foot bar support assembly} movably carried by each of the outwardly open slots supports {TAIL ~ the foot bar} 
{ HEAD ~ A foot bar support assembly } movably carried by each of the outwardly open slots supports { TAIL ~ the foot bar }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL