OK, so its OSHPark's Fault. You get three boards.

I got my prototype up and running had had a couple spare. As Its I2C from the PI to the controller, It was easy to set a different address and run two controllers on the buss.

Here is the result running at the Notts Gaussfest 2016 running at low power due to no heat-sinks.

I now have the heat sinks, just need a box (as most of it is live and open to fingers :(