Many of the the itemized project items really are interconnected.
This is not a bad thing, but maybe some additional commentary that documents
that interconnectedness should be added.

The key item I see that ties many others together is ID 79, "robot to replace
electronic modules in tunnel".  I can't see a machine of this size coming
together and being operable without tunnel robots.  The only question is
how many, and how specialized?  When I have sketched robot concepts before,
in the CEBAF context, I have focused on monitoring and troubleshooting.
So the gear attached to the mobile platform is relatively simple:
   - Video camera
   - Microphone
   - Radiation monitor
   - Antenna (with spectrum analyzer)
   - Thermometer (contact or pyrometer)
Other potential jobs for tunnel robots include module replacement, as you
say, and making small mechanical alignment adjustments.  The robot could
either perform the mover (ID 7) job itself, act as a coarse adjust for fine
movers, or replace worn out movers.  I guess the tunnel will be too hot for
a robot when the beam is on, so they need alcoves in which to hide at
intervals down the tunnel.  A possibly more specialized "robot" could
be used to address ID 60 in operation.

I don't know enough about the NLC mechanical layout to know if an idea
of mine from long ago is relevant.  Can the basic girder repeat unit be
mounted on wheels, in a relatively small tunnel?  The movers (ID 7) could
lower the entire linac onto these wheels, and a kilometer at a time could
roll until a girder that needed repair or replacement landed in a service
building.  For this idea to work, the electrical connections to service
buildings have to be few and far between.

Regarding ID 19, "new electronics standard - VME replacement", see my
attached crate.html, dated Feb 22, 2000.  This subject interconnects
with ID 79 (robot), field wiring connector selection, most of the
electronics initiatives (like 3, 18, 22, 24, 25, 26, 28, 44, 46, 53,
and 84), and the phase/frequency reference distribution "cable plant".
I don't see separate project ID's for connectors or the reference
distribution, should they be added, as a placeholder for the inevitable
discussions?

I have ideas for ID 33 "bunch length monitor via spectral measurement",
which is in fact related to ID 65 "Optical Diffraction Radiation".
This involves a beamline mirror (with a hole in it, of course), a
diffraction grating, and a set of bolometers.  I am pessimistic that
the wake field physics can used to create a transverse image of the bunch.

         - Larry