Consumed the rest of the bottle last night and it was, again, very nice. The tannins had mellowed more than the previous night, but a lot of the same flavor profile was still there. It did pick up plum note that was very pleasant. Really great stuff.
If you have several bottles of this, I don't see any reason why you couldn't open one up and put in the decanter for a few hours. This was really great with food.