Most efficient way to A/B two mix ideas in one .cpr?

Yes, its the streamlining that is so important to me because when A/Bing I do not want anything in the way of critical comparisons. Any extra click or scroll to find a section throws me off.

This little plugin seems handle a premastering a/b/c/d workflow pretty seamlessly.

Since I just started to transition from 6 to 7, I will be taking another look at studio sends as well, as I can see the CR itself has changed a bit, perhaps with the new mixer the studio sends can seem more like a part of the project and not another series of mixer channels somewhere… I think that was maybe distracting for me. I just need to wrap my head around it tighter.