I worked in leather for many years, the very best way to 'break-in' any new leather saddle, shoe etc. is to soak it then use it until it dries (cover the saddle with a plastic bag if you don't want a wet bum! But uncovered it will mold & dry much quicker) Soldiers used to either fill their new boots with water or piss in them, leave them overnight, then wear them until they are dry. I think that Proofhide, Hide Food, Neatsfoot Oil etc will help to extend the life of your saddle, I oil my Long-John's Brookes B33 3-4 times a year, it helps to stop the leather from cracking, I'm sure that the salt content in sweat is not beneficial to leather.