Just found these online. some really unique construction/designs. not exactly metal, but I find them interesting 
http://www.scottfrench.com/s/Gallery/Finished Customs
details on one of the models:
"There's an egg shaker inside the body with a contact mic attached to it. There's also two mercury switches wired into the electronics so moving the neck up and down can swap between bridge to neck, bridge to kill, or bridge both pickups. The egg shaker mic also picks up the strings so the bridge to kill setting has some weird sounds too."
and look at the back of the headstock of this model. it has walnut stripes, but it's a jointed headstock. really odd.
http://www.scottfrench.com/i/Finished Customs/Aaron Burke's SF3 Guitar/01

http://www.scottfrench.com/s/Gallery/Finished Customs
details on one of the models:
"There's an egg shaker inside the body with a contact mic attached to it. There's also two mercury switches wired into the electronics so moving the neck up and down can swap between bridge to neck, bridge to kill, or bridge both pickups. The egg shaker mic also picks up the strings so the bridge to kill setting has some weird sounds too."
and look at the back of the headstock of this model. it has walnut stripes, but it's a jointed headstock. really odd.
http://www.scottfrench.com/i/Finished Customs/Aaron Burke's SF3 Guitar/01