Here are some pictures of the Compomotive hub and pin. I suspect Trigo uses the same pin, manufactured by someone else. David, let us know if they look like the same piece.
From the pictures, it's clear there are two different angles. The 76 degrees that David measured on the pin and then perhaps 90 degrees on the hub.
Here is the hub, pin drive and hex wrench
Here is the pin showing the contact area with the hub. Notice its only contacting on the inner edge.
Here is the hub showing the same contact on the inner edge.
Clearly two different angles.