Brettski,
I am also the king of overkill. I built a cedar clubhouse for my kids big enough to live in - I have only seen them in the club house once - I think I will convert it into a deer hunting stand.
If I ever have to replace my 6x6 cedar piers, I imagined that I would just slap new ones in, along side the older ones. I would just set the bottom of the new posts on top of the concrete footings and bolt the top to the existing deck beams and solid portions of the older posts. After the new posts were secured, I could cut out any rotten post material.
This was the vision, (hallucination)
