I strongly suggest the Sheldon Brown Neats Foot Oil method. I have used it on four Brooks -- 2 B-17's and 2 pros. It just takes a little edge off, does not harm the saddle in any way and is probably good for the leather.
I really don't know, but maybe this is an idea:
I've broken in many baseball gloves using a lot of very localized oil in the same spots every day, and beating them with
one of these wooden ball-mallets. But don't pay $30--you can build one on a fat dowel for probably just a couple bucks (right now, $6 plus screw/washers at Home Depot). The top-mount style would be easier to build.
You'll have to figure out your saddle's exact sit bone spots to experiment properly.
