a mounting surface structure having a top surface and {HEAD ~ 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 
a mounting surface structure having a top surface and { HEAD ~ 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
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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