Glad that you were able to get it fixed up! If you have a left tear I have found from some recent personal experience that it's a good idea to check the axle to axle length on both sides of the bow. Depending on the bow (I haven't tried to tune a Ross yet, so I don't know how centered they need to be coming off the idler) you may have a bit of string angle coming off of the idler wheel in order to get both sides of the ata to be in spec. I had tried to set my string coming off the idler on my current bow so that it came off straight, and I had the worst left tear that would not go away. I too tried to move my rest to the right until I was about to get fletching contact (I may have been at that point) and decided something else had to be wrong. I was off by 1/4-3/8" too long on the left side. So I put a bunch of twists on that side of my yoke and brought it back to where it needed to be. My left tear all but disappeared. My ata was now correct, and I do have decent string angle coming off of the idler, but it's also shooting very well. So, I hope that helps someone in the future so that they don't spend hours upon hours trying everything until they find it's something that is a rather quick fix like I did.
To fix a left tear, add twists to the left side of your split yoke, and take twists out of the other side if possible. Do the opposite for a right tear if it's not going to go away with rest movements.