It’s hard to truly understand saddle fitting until you’ve had the chance to watch how a fitter evaluates a saddle. I recently came across an excellent series on the subject from Schleese. This 9-part video series gives clear instructions that demystify saddle fit.
Here are the first one. In addition to talking about how the balance of the saddle affects both the horse and the rider, this video clearly shows where to place the saddle on the horse’s back. It amazes me how many people put their saddles too far forward.