I like what you're going for. Here's my two pence.

-The cords should be darker. They would look really good if they were the same colour as the mock up.
-You should try having the cords laid out/tied the way they are in the leopard sporran photo. They might sit better. Is there a way to make the knot smaller?

It's a very nice work in progress. I can't wait to see it when it's done.