I'm nearly finished on my breadboard end worktops and it was a really easy process with a domino. at least after I'd established the thing was putting dominoes in at an upward angle the play in the detent was faulty.
anyway I want to use 1/4 inch blackwood dowels but the problem is making them and inserting them I guess. they won't knock through a dowel plate without breaking. maybe I should use another wood unless someone has any suggestions.