Pins associated with {TAIL ~ the housing seat} through {HEAD ~ selected apertures} in the bar at a determined position 
Pins associated with { TAIL ~ the housing seat } through { HEAD ~ selected apertures } in the bar at a determined position
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH