I was recently given a Telex 5x5 headset and I was wondering if it would work well in the CRJ-200. I have heard that the cockpit is too noisy for it and that I should have dual custom (deep impression) ear pieces made in order for it to work. From those who use the 5x5, are dual ear pieces necessary, or can I get away with one ear piece, and a foam ear plug in the other ear?

Thanks in advance for the advice.