I had this question when I was doing a cap replacement that thankfully resurrected my dead TurboExpress. I could've bought the bigger, cheaper, standard aluminum caps but instead I bought the exact SMD replacements, so it was no problem to put the RF shield back on, but then I thought if I had another problem in the future, I don't want the inconvenience of having to take it off again, thus I got rid of it anyway... Apart of you says that the engineers put it there for a good reason, so you feel you should respect that, but then there is the fact that US/FCC requires it for electronic devices sold here meaning it probably wasn't the engineers' choice. So what does the FCC know that other countries don't ? I guess I'm interested in what JKM mentions, that he got rid of interference by adding more of it. Would like to know how this "interference" manifested itself (wavy lines in the video or something, etc. ?).