I assembled the initial boards (distribution board and fuse board small v1.1, fuse board large v1.0). Everything works fine. I made a few small tweaks after building this revision:

• Fixed silkscreen outline of the Anderson connectors. I originally followed the mechanical drawing, which appears to be incorrect (or at least misleading). I changed the outline to match the 3D models that Anderson provides, which seem to be more correct.
• Increased the copper ring around the slot slightly. I hope that this will make it easier to transfer heat to the copper on the PCB and make it easier to solder.

I haven't tested these changes yet, but they are pretty low-risk.

Load Testing

I applied a moderate load to boards for testing. I used a 100W, 2 ohm resistor with a 12V, "10A" power supply, and measured the voltage drop at the farthest connection point from the source. The power supply is cheap, so it drooped to 11.5v during testing, for a load of ~5.75A.

These numbers are pretty approximate. They suggest that the resistance of the board is low enough to be negligible at reasonable loads.

Here are the assembled boards: