Design Icons Series: Eames DSW Chair By Vitra

After a busy 2015 working on all sorts of corporate design projects, I have finally found some time to work on some personal projects. I have decided to illustrate a series of 'Design Icons', not the most original project but one that I'll enjoy.

My first of the series being the Eames DSW Chair. Although I'm happy with the shape, there is something thats not quite hitting the mark. What do you guys think? I'm wondering if the subtle shading is too subtle, but I look forward to your thoughts and suggestions.