
Do you think you could just print the mold directly? I haven’t looked deeply into the techniques.
The pillory was pretty simple, so I didn’t feel the need for a plan. I had the pillory part sandwiched between a pair of 2X4s with regularly-spaced holes on each end. Long bolts ran through the sandwich, and could be removed to adjust the height. Most of the time it was attached to the bed, but I also made a base out of a pallet so it could be used freestanding. Sadly I don’t have the bed anymore. I need to find a place for the pillory in my new house and pull it out of the garage.
I too have gotten some good stuff from there.