I've updated the box model to have D-holes instead of flange mounts for the BNC and SMA outputs. We will make short patch cables that go from SMP->SMA and SMP->BNC inside the box. The D-sub-9 in on the board will likely have a ribbon cable connecting it to the back panel of the box where there will be a through connector. Since our initial PCB order didn't go through, we may have one last chance to revise this, but it certainly won't be the end of the world if we can't.

I have changed the spacing of the 1/4-20 taps in the bottom panel so that one of the outer ones is directly below the PD. This doesn't sacrifice the integrity of the design and it makes it so that we don't have to worry about rotating the PD out of the beam path during the initial phase when we just use posts to mount the boxes to the table.

We should start thinking about how we want our mounts to look. They will probably be blocks of brass or something that have holes countersunk from the bottom so that we can screw them to the bottom of the PD boxes. In between the base and the box, we should have an insulating layer thick enough to avoid capacitative ground loop coupling. I'm not sure what kind of screws we'll use to avoid DIRECT coupling...