I forgot to mention which side is what. The concave side in your last to pic's is called the "coast" side which is where the pinion contacts in reverse. When setting a used set up, the best place to start at is by looking at the reverse side which isent used nearly as much.
You first pic has a decent reverse side pattern to it. What shim size did you have behind the pinion carrier when you took the first pics in your post?