Eta: you have to break the fibers in both directions.
Yeah, I remember doing this, but it was still a bit on the "crunchy" side. Never could get anywhere near the "buckskin" type pliability we're looking for.
I've heard of chemical treatments, brains, mayonnaise, eggs, and all sorts of treatment agents and drying methods from sun, to chemical to salt.
All I know to do from experience is scraping and salting. How do you and your son treat hides?