Looks pretty good. Now since you asked, I think the wooden beams, legs have the right coloring but appear too rough. Meaning, at the scale we work on, rough lumber (from age) would still appear to be smooth. The 3rd dimension (roughness of wood) is pretty small, take a look at the tower in the link below.
I think it looks very good as is, you're looking at a very in focus pic from a few inches away.
Put that on a layout and view it in context and it will convey the look he is after.
In modeling sometimes exact scale doesn't really work, you're trying to create an illusion.
IMO 65 has done it very well.
Even though your picture is good.
Pictures sometimes don't portray what it actually looks like to the eye.
I think it looks great, I like the "rough" look on the lumber.
How did you apply the weathering?
Brush? Airbrush? Other?
Another technique for adding wood grain (works best for narrow long timbers) is to draw the teeth of a sawblade across it.
Take a look at the hairspray technique for creating peeling paint with acrylics... Basically you put down a dull grey coat that looks like sun-dried wood (also works with rust on metal surfaces). Let it dry completely, then spray with hairspray. After that dries, paint on your color. Keep it rough looking since this is supposed to be old wood -- maybe use a stiff brush so there are lines in the paint. Let the acrylic dry for 20-0 minutes, then dab hot water onto the surface where you want the paint to chip. Let the water sit for a minute, then use a very stiff brush to scrap at the paint. You should see chunks come up, or you can even work it to roll the paint. Once you've finished working over the model, let the paint finish drying for 24 hours.