A tray may also be removably secured in {TAIL ~ the channels} of the display board extrusions in {HEAD ~ selected removably secured positions} 
A tray may also be removably secured in { TAIL ~ the channels } of the display board extrusions in { HEAD ~ selected removably secured positions }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD