Both rails move with pretty much equal ease. One time I have extra ties, and the next it's extra rail on the same curve. I considered trying to flow some ACC onto one side to lock it in, but not sure if the glue will adhere to the ties. On the plus side it does solder nicely.
Once I get past this helix the appearance will be more important, so I really want to figure out it there is a good way to tell which side should be on the outside of this track. I know my local club has some in use, but won't get the chance to go over there for another 2 weeks. This track was recommended to me as pretty much the same as Atlas, but my results aren't even close to the same.