I have a fence which I would like to raise by 1ft. The posts are 4x4'' pressure treated wood. I would like to cut a new 4x4 post into 1ft pieces and put on top of existing ones.
What's the best way to attach the new 1ft pieces to the existing posts without the hardware used to hold it being visible? I saw a couple of neighbors used caps, angles or ties for that, but it visually sticks out -- metal on wood is too much contrast.