So I just finished pulling my old NES apart (original model), cleaning & adjusting the pins on the 72 pin connector, and putting it back together. During the process I found two RF shields (the sheet metal parts), one covering everything (sits on top) and another deeper down. I wasn't able to figure out how to get the deeper one back in, but managed to get the other one on.

I've tested a few games on it and it's working great, haven't had to do the reset-till-it-works dance yet, so the missing shield doesn't appear to be an issue. Still, I was wondering if anyone here has enough experience with the NES hardware to say whether or not leaving it out is a particularly bad idea.

Thoughts?