Sorry for taking so long to respond. I've been out of town for a bit.
This is currently running humbuckers only. I'm trying to give us a chance to get the first few instruments as stable as possible. After I'm really comfortable with the progress we're making, then I'll start installing the more complex electronics. But all of the guitars we're building are setup for piezos. The bridge is milled with extra holes fo the wires coming off the saddles and there's a channel under the bridge for the wiring to run through into the control cavity.