I have an old boy(21 years young) who's had problems with his back in his old home and he's just starting to come right, he's on loan part, and she wants to try a treeless saddle- his problems from his back all came from an ill fitting saddle so now he's getting used to a saddle that fits and has a tree, I don't think it's good for him to change into a treeless, like she wants to?! Ideas or suggestions anyone?