I think I remember reading somewhere that they do not chamber the ash bodied Sadowsky's, just the alder. Am I wrong?
I believe what you are remembering is that (I think) the NYC ash bodies with natural (clear) finish are not chambered, since you would see the 'cut line' between the top and rest of of the body.
Also, only the NYC models are chambered... none of the Metro models are, regardless of body wood or finish.