I agree with FB that this might not be an issue of the rear triangle being offset to one side. If that was the only missalignment then cold setting would be a good soultion. But there are a few other ways a rear end can be off and cold setting will often only shield the true problem. If one only looks at one point of alignment then that's the only frame of reference that they will talk about. There are three planes of alignment that a rear wheel needs to agree with to be "in line". Cold setting will only adress one.

As has been talked about here recently with both front and rear alignments, one needs to fully understand the various factors and how to make them better. many people who don't build bikes or spend time with full capicity measuring devices (note I did not say any one specific tool) and have used them enough to really know the give and take of aligning will only talk about what they do know. While not wrong in the partial world they discribe the full picture is more involved then the simple one plane understanding they speak within. Andy.