Dave, Nice conversion and the comp. looks good. This is a cool image , you could have alot of fun with in OOTB. I'll have to look for images like this when I'm in the field.
Dave, this is excellent! Love the comp on this - I think you nailed it.
As a side thought, I did a conversion like this once with an old abandoned farm house and let about 20-30% of the natural wood color to shine through. It added a whole other dimension to the piece - you might go back and try it with the black and white layer lowered just a bit to let the natural tones of the wood start to shine through and see what you think.