To answer another question I looked at a few RS tours. I've never been on one and to be honest, not sure I ever will. Just not my style which is more about me than the tour.
So, while looking I saw the Bulgaria tour. I've have been to Bulgaria three times. I love Bulgaria. All three times with a private guide, twice with the same one. I have seen everything on the RS tour, a few twice. If I were to customize it for just me there are a few things I would change but my taste is a bit ... well ... odd maybe. I have looked at a lot of the RS tour itineraries and this one is absolutely outstanding. Good job Rick.