A closing device with selective locking for closing a frame includes a roughly flat lid selectively applied to the frame, a lock connected with the lid, and a key which has a socket and an arm, one end of the arm carrying the socket. A pre-polygon input and output telecentric optical subsystem includes a beam conditioning system that focuses the light beams in a cross-scan direction, collimates the beams in the scan direction, and individually focuses the beams on a polygonal mirror deflector, which reflects the beams along a first scan path. Re-work may be by polishing at the one or more local valleys. Each transmitter in the first and second WDM modules is also tuned to transmit optical signals in channels included within the associated wavelength band of the transmitter. A plurality of high voltage access transistors are each electrically connected to a bit line in the first set of bit lines.