Thanks so much everyone. I am pretty much convinced that the PRS pad is too thick and will cause more problems. Though I like the concept, its just too thick. Tony has a 1" classic equine pad I'm going to try just to prove myself right
I think I will hold off for awhile and double check my saddle and girth placement. I normally always pick up saddle and pad, place it forward and slide it back till it stops every time I saddle up. I'm very careful to check her shoulder and make sure I am behind it. I have been going by the front pommel rather than the concho so that may be my mistake.
Since I have been using the shims I have been paying more attention to the pad placement than the saddle so I may have placed it too far forward in those photos... Oops
I find the Thinline interesting though, since Vida does have a sensitive back. If I find my Christmas money burning a hole in my pocket I may order one of them.