Man I see some things going on here that I really like. We gotta know more about the tank and front end. First 550 I've seen with a oil pressure gauge. It's mean looking!
I do gotta ask, are you not going to slide right off that seat? Angle seems off, aesthetically and functionally. The swing arm is a hard sell for me, seems kind of clumsy/bulky looking. Is it hard tailed or mono shock? Hard to tell from the pic. Only constructive criticism though, a lot of nice work so far.
Overall an exciting project, keep us up to date on progress!