I have a Morab mare that is built downhill and also has wide low
withers. I got "the corrector" and a cover for it from Len Brown. It
did not work. What does work for me is a Barefoot Cheyenne
treeless saddle. You place those more forward on the horse than a treed
saddle. You sit it as if you are riding bareback. I also use a Dixie
Midnight pad under the pad that comes with it. Hope that
helps...