This is one of the compositions that I was running through in my head prior to getting the extension tubes. When I shot it, it wasn't exactly what I was looking for, but I'm not sure what it's missing.
Anyhow, this is how I roll, and I roll 20s.
I guess I've let the nerd out of the bag.
This was taken with the 12mm tube on the 50mm/f1.8, ISO 800, f5.6, .6sec exposure, no flash on the tripod with a cable release. Again, not exactly what I was looking for, but I'm happy with the colours, and the long exposure did give me the deep wood grain that I was hoping for without letting the orange on the die become overpowering.
It's still not quite right, but I'm not sure what it's missing.