Hi Jon,
Nice work so far, keep it coming. I love posts with pics.
While I love cafe racer styled bikes, I, personally feel they should be built from bikes that are too far gone to restore. Your original bike looked really nice standard machine. Still, each to their own!
I'm really just glad to see another 550 put back on the road.
Good luck with the build. You'll get plenty of help from the guys here, maybe a few difficult questions and certainly lots of interest.
I'll be keeping an eye. Happy Easter and cheers from Ireland!