Structural coupling

I'm currently starting a project which needs strong connections between structural beams. Though i do not want to superglue it because i want to keep things changeable. Therefor I made this test piece to see how solid it would be. It was very though to press together (used a gluing clamp), but it's rock solid, feels like one piece without any movement.

If you need to disconnect it, i think you can just press them separate again with a clamp. I will create some tools for this in the form of ST