The reason that I mentioned the structure was that you said these would be run "inside the wood framed wall". To me, is seems that in order to get inside the wall, you would have to breach the top and bottom plates, which are an intregal part of the structure. I know that such gutter systems exist, as I have seen them, and I assume that it is not much of a problem on a new build, but it seems that it could present a whole other set of issues on a retrofit. Was just throwing it out for consideration.
Thank you very much, DexterII, for elaborating on this. I can clearly see your point now. The entire house has metal beams around the perimiter going from foundation all the way to the roof, so I don't think this will impact the structure much. But I will run this by a structural engineer. Thank you for bringing this up!