a mounting surface structure having a top surface and a bottom surface, said bottom surface of said mounting surface structure attached to the adjustable post mechanism, said {HEAD ~ mounting surface structure} positioned along {TAIL ~ a horizontal axis} 
positioned along
a mounting surface structure having a top surface and a bottom surface , said bottom surface of said mounting surface structure attached to the adjustable post mechanism , said { HEAD ~ mounting surface structure } positioned along { TAIL ~ a horizontal axis }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL