Hello:
This may be old news to some of you, but the latest run of the Kato E 8's have a slightly modified interior. The photos for DCC installation on Train Control Systems website are slightly out of date. Each truck now has a plastic cover that covers part of the metal strip. The metal strip doesn't bow up like it did before.
One N scale manufacturer makes their equipment more DCC friendly, while another manufacturer moves in the opposite direction..
Also, on the C&NW E units, the porthole window "glass" is dark gray, a really neat effect as you're no longer looking at a metal weight, but appears more prototypical.
Scot