Added a leg beneath sculler1956's V2 PCB standoffs designed to have a 3/8" nut implanted during a print pause programmed at a height of 1cm. The height of the nut cavity was extended beyond the hardware's actual height to prevent possible damage of the extrusion nozzle bumping into the nut.

Before printing, add a print pause around 1cm. For me, printing at a .1mm resolution, this came around layer 103.

To do this in Cura, at the top click 'Extensions' -> 'Post Processing' -> 'Modify Gcode'. Click the "Add A Script" button. Select "Pause at height".

It can be a tight squeeze to get the nut seated. I found it best to partially thread in a bolt and wiggle the nut down into place.