Hi Todd,
First off I like the photograph. Good choice of subject, good composition, plenty of interest, and nice textures. As Russ would say, don't change a thing.
A few processing comments; please don't take these as "you should do this or that" comments, it is more of a mind-dump. First, I am intrigued as to why you chose a square crop for this one, when the background subject is rectangular. Of course I don't know what was in the frame that you cropped out. Second, you have gone for a very high contrast BW effect and in this case it seems to work well. You might consider adding some grain to the processing - the super high contrast looks maybe a bit unnatural without a bit of grain. I think I may have mentioned in another of your threads that for BW processing you can go a lot further with contrast adjustments (not just the contrast slider, but whites, blacks, highlights and darks as well as clarity) compared to colour and get away with it and this is indeed true. However, just because you can do it doesn't mean you should do it. In the case of this particular shot high contrast works, but please don't feel you have to do it all the time. Same goes for post crop vignetting; maybe you went a bit far with that in this case.
