Express Yourself

concept
by Dave Savitt

cross-sum
constructed by Tim Peeters

The
cross-sum is standard, but fairly nasty.
The solution

to the
cross-sum is in the accompanying image.

The
highlighted numbers are: 8465 3478 2965.

Solvers
should recognize this number format -- three four-digit

numbers
-- as the format of FedEx tracking numbers.
(If you drop

the
three four-digit numbers into google, it will offer to use them

as a
FedEx tracking number, so that's another way to get the aha.

Track
this tracking number. You find that the
package was delivered

to the
following address:

102 MIT
12

Go to
that address, find the package, and retrieve from it: a keyboard

key,
which is the answer to this puzzle.
(Use KEY for the first-round

metapuzzle.)