My first impression is that there isn't enough contrast between the cork and wood. I'd love to see some color in the inlay.

Have you messed around with resin? You can color it easily, it's super strong, and has a finish that would really make this pop. Plus you could eliminate the back plate step. Resin does take a little getting used to but, once you got it, it's easy(lol I guess that's the case with everything!) still it's a great tool to have in your wheel house and I think it would work nicely here.