I have never used concrete posts before as my prefernece is timber but I am matching in. I want to again use close board to match in with existing. Do I go with morticed posts and ready made panels or morticed and make them up myself. At this point can't really see any advantage with the mortice system, why use it? cost? the fact that it uses a seperate gravel board? Surely the slotted system means that when a panel rots, you just slot in a new one?