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