Hi Rob, In the centre deck I used three 25mm x 3mm stringers on their edges. Effectively I went with the theory that if you supported a ruler on its edge, over a less than 200mm clear span, it can hold a fair bit of force. These stringers are wider than a ruler, ply, and coated in resign, so I hope they do the job. No doubt if wore my stilettos I would punch a hole right through, but I think I only need to worry about a knee or elbow. Anyway for now I think they’re pretty solid so we’ll just have to wait.