Hello Guys. Sorry for bringing this post back, but just now I saw it. Regarding the gap on the butt of the handle, it is not wood movement. The handle has several pins inside, and was assembled perfectly. But when I put the epoxi on, was a very cold day, and the epoxi where not so fluid as it should be in a normal climate, so I needed to press harder to fit the handle again. Due to the delicate carving on the back of the handle, I was afraid to break it by pressing too much, but it seemed to be all right. After the epoxi was hardened, I started removing the excess and noticed that the wood was glued with a very slight gap to the tang on the butt. As the knife was already finished, with the damascus etched, I wasn't able to fill this gap with superglue or something like that, because it would mess all the finishing. I use to cover all the handle surface and the collar/tang with adesive tape, and then glue the handle. After the epoxi is hard, is very easy to clean everything, but the same can't be done with superglue.
Cheers!