Here are some confo type shots so you can see what her back looks like.
With the Saddle No Pad.
Saddle with one pad that has extra padding in the withers area.
Heres what the pad looks like.
Finally with two pads
Now for the sweat marks. The first one is her right side, you can clearly see the dry spot.
This is the left side. It had dried a little by the time I took the pic. It looked just like the right side though.;)
Ok that's it I think If you need any other pics for reference let me know. ;)