That saddle in no way, shape, or form fits. Not even a child could get three fingers in between that horse's withers and your saddle. I have a TB, and he has shark fin withers, even at the proper weight your horse's withers having nothing on my horse's, so don't try and play the high withers card. You can do permanent damage to his back and mind if you continue riding him in that saddle. I don't even agree with you riding him period, but I can't stop you, and if you're going to at least have the decency to get a saddle that fits him a little better.
Sully ~Sullivan's Fly Supply~ [17.1 TB] RIP 2/24/14
Rio ~Camperio~ [18.0 Oldenburg]