There's a very thought-provoking blog post by Catherine Haddad on The Chronicle of the Horse website, titled "'Supersize It' Syndrome". It's probably one of the most interesting views on saddle fitting theory written by a non-fitter that I've read in a long time. Ms. Haddad has obviously put a lot of time and thought into this issue, and given the success she's acheived, her methods definitely work for her. She makes some very good points, though I think some of them need to be expanded and a more balanced view given. So please, go read her blog. Print it out, or take notes. Then come on back here, and we'll go over it point-by-point.