It is good to see the mock up and I will be at least partially going down that path.
I think you do need more room for shaving removal/clearance. although exactly how much is the big question. Will you be using a wooden dowel to secure the wedge in the final version? If so I am concerned that the size (I am assuming 10mm or 12mm) and shape will tend to be a barrier for shavings too resulting in clogging. I realise you may have gone to that size for strength. An alternative may be some refinement of the dowel shape admittedly at the possible expense of strength or go to a brass/steel pin. In metal 6mm would be ample. Just a thought. Steel in particular could be salvaged from something lying around probably
"Power tends to corrupt. Absolute power corrupts, absolutely!"