Couple other things I was thinking about last night.

How much travel does the wheel have? Will it bottom out without hitting the exhaust?

What are you doing to protect your arse and bike from the heat? I might have opted for dual CF cans for improved heat dissapation but wrapping the existing metal pipe might protect the bike enough? Perhaps a custom CF/Aluminum heat sheild is in order?

Think your going to run into trouble installing the headers as a solid peice, suggest allowing the rear down pipe to rotate 180 degrees and have about 1" or so of up and down travel on the Y axis. It's a tight fit getting things on as is.