Rocs, Rocs, Rocs, 6 at a time, you have it bad, and you have expanded to the 750 . You're growing up.
I think it will be interesting to see what you think of the 750 after you get comfortable playing with them for a while. I've tinkered with a few over the years but always came back to the 550s, just like them better.
I'd be more interested in the engine numbers so's to identify the engines,so you know what you really have, but that's just me, also a 550 guy.
Nice score.