Tried on the .05 SS. Im in luvvvvvvvvvvvvvvvvv.
Hi Caz, sorry I forgot to add an update! Here's a photo of my 0.05 SS DBTY (layered with another necklace for a pic on a different thread) with the extra length.

You can see it hangs down off my neck now. So much more comfortable than before, like when I took these photos:
http://forum.purseblog.com/the-jewelry-box/tiffanys-jewelry-addiction-discussion-thread-756234-81.html#post23593805