{HEAD ~ 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 {TAIL ~ mounting surface structure} positioned along a horizontal axis 
{ HEAD ~ 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 { TAIL ~ mounting surface structure } positioned along a horizontal axis
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH