I thought the grounding "bus wire" in Tiger was an interesting idea. I don't think it's what you find in a typical production guitar. In most guitars the grounding wires connect pot to pot, or bridge to pot, or pickup to pot, or "where ever you can find a ground" and then to the plug ground. So you have almost a ground "web". It looks like Tiger's bus wire is just what the word implies. I replaced the old electric service box in our barn last year and the new one has a ground bus rod. The ground wire from each circuit Romex cable connects to a pole on the ground bus, and the ground bus also has a connection for the main ground that connects to the rod you drive in the ground. It looks like the bare "bus wire" that runs through the cavity in Tiger does the same thing- all the grounds from the pots, pickups, bridge, switches, etc. run directly to the "bus rod (wire)" and the bus wire goes to the ground on the plug jack. It's like doing the grounding in a linear fashion. Do I have that right?
"Do not write so that you can be understood, write so that you cannot be misunderstood." -Epictetus