Looks nice. I sure know what I want to do with my frame if I ever get that ambitious. The exhaust is just a little too long and the heat shield is a little much but it doesn't kill it for me. I still kind of like it.
There was a guy on the old board a year ago that did this same undertail mod (could be the same guy). IIRC, he had to raise his tail several inches to make it fit. Seems the bike would get twitchy. Maybe not.