FIG 3 illustrates {HEAD ~ one possible spacing arrangement} in {TAIL ~ accordance} with the principles of a preferred form of the present invention 
FIG 3 illustrates { HEAD ~ one possible spacing arrangement } in { TAIL ~ accordance } with the principles of a preferred form of the present invention
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH