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