This tweaking has lead to me buying a few for just this purpose. I also have a few which were donated specifically for testing purposes (the Daytons). I measure them, open them up, inspect them, maybe try a tweak, then re-measure them. These pages are a result of that interest.
There may not ever be more than the following pages on lamb's wool and adding a chamber, since I can't believe that there are many things which can be done to tweak a tweeter in addition to these two. If I discover or hear of a tweak worth documenting, I may add to this.