That was the plan.. Hardwood base with all the wires concealed inside.
However I'm still lost on how the layers connect to each other.
Each layer has 16 wires, I can hide 8 in the base if I mount the layers vertically going across.. But there's still the problem of the other 8 wires. My idea is to connect them together in such a way that they can draw power from the same source without needing another 8 wires each time a layer is added, by soldering the layers together instead. I should probably start experimenting, I just can't picture how it fits together in my head!