I think you have an excellent photo here. I think it's beautifully sharp, and I love the detail in different areas, the texture of the thread, of the reel and the way the light catches it.
I saw the fluff on the background but to be honest thought it was on my screen and ignored it.
What I find mildly disturbing is the totally mono - tone of the background, it means the reel and thread appear to be suspended rather than sitting on a surface, and that goes against my practical mind. I wonder if it would be better if you could see a range of tones in the background, or at least that the needle and reel are sitting on a solid surface.