If you haven't yet, I do suggest checking out the scenarios book with Dissociation. You may find it at DriveThruRPG.
At some point in the scenario, the investigators have to interact with a kind of pillar.
I thought, it would be cool to give the said pillar to players, so they might interact with it out of the game. It was a blast every time I ran the scenario.
I've designed this a few years back, so I have no idea what the symbols mean.
Tolerances are pretty forgiving, I guess around .25, but it might help to scale the rods down a few percent.
The author marked this model as their own original creation.