the ballast rail comprises a planar portion, an offset portion, a lip portion and a beveled portion such that {TAIL ~ the planar portion} has one or more ballast adjustment slots for removeably securing {HEAD ~ the ballast} to the ballast rail, 
the ballast rail comprises a planar portion , an offset portion , a lip portion and a beveled portion such that { TAIL ~ the planar portion } has one or more ballast adjustment slots for removeably securing { HEAD ~ the ballast } to the ballast rail ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH