{HEAD ~ A tray housing driving mechanism} 18, further comprising a switch engaging said first drawer to terminate movement at an extreme limit of {TAIL ~ movement} of said first drawer 
{ HEAD ~ A tray housing driving mechanism } 18 , further comprising a switch engaging said first drawer to terminate movement at an extreme limit of { TAIL ~ movement } of said first drawer
HEAD 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 TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH