Thanks everybody for the nice response. After looking at a gun for a while, I'm not always sure whether it's a success or failure. For whatever reason, when I design stuff myself without any direct influence it often tends to have sort of an art deco appearance. Just sort of happens sometimes. I've been trying to make a conscious effort to approach the design of guns from more of the perspective of a entire object lately and I think it pays off. In the past I've found it's easy to focus on individual design elements and not giving the whole object the proper consideration.
As to the length of the box lid, I'm not really sure. It just looked good, so that is what I made it. I've looked at lots of originals and over time this provides sort of a guide without consciously thinking about it.
The darkening of areas of the stock was done primarily with bone black, and maybe a touch of transtint dyes as well. Sometimes the boneblack looks a little better if it's combined with oil containing some warmer tones in my view. Seems to take the harshness of the black away. So like I said it's mainly just bone black (sold as drop black pigment) mixed with finish. It's easier to get color by starting the darkening process early in the finishing. If you finish the gun and then try to darken it doesn't work nearly so well. Hope this helps a little bit. Seems I've described the process before on here. A search might help too.
I'll try to get some additional photos. It would be nice to show it "taken down" since that feature is pretty unusual.
I might add that this rifle is for sale. Check the "for sale" section of this site for a listing.
Thanks again guys. If you think I can help, just ask.