Just an FYI, there is/was a technical issues w/ the UM Merlin demo that I had project86 confirm. That is the reason I've delayed sending the unit to reviewers till i get a replacement unit which hopefully resolves the issue. This is a whole other can of worms, not even related to demos versus customs for the most part. If you want to know more you know where to hit me up.
All the more reason to avoid customs at all costs. ;)
Very interesting graph...
Some more information on "Real World Attenuation Values"
...and a very interesting article.