Thus, in a rod and connector kit having rods in {HEAD ~ a progression} of lengths, L1, L2 . . . Ln, from L1 to {TAIL ~ Ln}  
to
Thus , in a rod and connector kit having rods in { HEAD ~ a progression } of lengths , L1 , L2 . . . Ln , from L1 to { TAIL ~ Ln }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH