 
          A piece of blue painters’ tape holds the LED in place by its
        
        
          wires in the top of the shell. Slide the LED into place and
        
        
          observe that it is positioned to shine out through the lens.
        
        
          Then put a drop of Canopy Glue to hold it in place, as in figure
        
        
          13. Set it aside to dry for at least a few hours before working
        
        
          on the shell again.
        
        
          
            3.3 Fix Cab Floor
          
        
        
          Several of the locos I did in this batch had had DCC decoders
        
        
          installed previously. The cab detail floor had been cut away to
        
        
          provide a place for a very small decoder to reside. I fixed the
        
        
          cab floor by cutting a piece of 0.02-inch thick plastic (black,
        
        
          in this case) to fit over the hole. I glued it in place and spray
        
        
          painted it with Krylon gray primer. You will only need to do this
        
        
          if your loco has had the integrity of the cab details damaged in
        
        
          a prior installation. Set it aside to let the paint dry. We won’t
        
        
          use it until the final assembly. See figure 14.
        
        
          
            4.0 Machine frame
          
        
        
          The key to this installation is to get enough room in the frame
        
        
          for the decoder, speaker and wires. This requires a bit of fancy
        
        
          milling. George at TVW Miniatures 
        
        
        
        
        
        
           designed this version and offers frame machining ser-
        
        
          vices. Even though I have a mill, I had him do the machining.
        
        
          Kato no longer has stock of the frames, so if you mess up your
        
        
          frame, you may never get your loco back running.
        
        
          If you are going to machine them yourself, there are dimen-
        
        
          sions on my web site 
        
        
        
        
        
          .