said vertical side plates of said supported bracket have support {HEAD ~ holes} of substantially the same shape having {TAIL ~ a common horizontal axis}, and said side support plates of said supporting bracket have oblong holes of substantially the same shape that extend in the vertical direction 
said vertical side plates of said supported bracket have support { HEAD ~ holes } of substantially the same shape having { TAIL ~ a common horizontal axis } , and said side support plates of said supporting bracket have oblong holes of substantially the same shape that extend in the vertical direction
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH