I have the vintage OG ROSS Distortion. While it is very cool I rarely use it and have it mostly for nostalgia, it was my first distortion stomp. There is nothing special about it, there is no secret sauce and I have ABed it many times with my OG D+. They sound almost exactly the same with the ROSS being slightly smoother and with slightly less gain. I would like to stress slightly. If that is what you are looking at buy a new reissue D+ and back the gain off a bit, you will be 99% there