Well...at a guess I would say that he learns about pressing all the time. It's not something they are shown and then, hey presto, he is a pressing expert. It is a skill learnt over years and years. And as pressing is a large part of how the bat performs, then why should he give away lots of pressing tricks and secrets to people he doesn't even know?
He's probably sweated blood and tears to learn so these techniques are probably very dear to him!!!
I'm sure he will pass the skills on to people he works with, so that they can continue to make excellent bats!
That's the way I see it. But I'm probably way off target!!