Hi Mike, and thanks for posting.
The overall impresion is good; it's only when one enlarges the image that the finer detail becomes clear. If you open the image, then click to enlarge it, the end of the timber in the cap, where it abuts its plastic component, gives the impression that it wasn't fully trimmed with a barrel trimmer before turning. As Derek pointed out, any micro-fine dust sanded off the bushes then contaminates the timber, in this case by getting into the ragged grain. Maybe this is something that your average Joe-public wouldn't notice, but I find that when every detail is right and you offer that perfect pen for sale, even the average Joe-public seems to notice that it's a piece of quality....it's what helps you to sell at a higher price.
Don't be daunted....keep up the good work and do please have another go.
Les