I just got apatN's distancer and quickly applied it on my MS Pro with some adhesive gum. I quickly noticed some details I have never heard before, or were just to low for my ears. Sorry I don't know audiophile jargons so I can't explain it the way you might understand easily. All I can say is it has improved my listening experience all throughout the spectrum. The bass if more pronounced. I've only heard a few songs though, and these songs I kept listening to for a week I don't know if it's enough for me to discern between stock and the MS Ultimate mod. I will have to listen to some other songs. One thing is for sure, it is more comfortable and the sound is better than with just the G cush alone.
PS. Thanks for the card nick. You are one thoughtful guy.