The 550 has been wrapped up for some time now. I've just been having too much fun with it to post. I put about 1000 miles on it with the factory suspension, then had my son install progessive rear shocks, 15 WT oil up front, and a steering stabilizer. The ride is substantially better now.
Mike enjoyed seeing the bike back together and I hope he can put some miles on it soon.
I threw in some pre-restoration pics for reference.