Replying to Breaking in skis

I thought this would be an interesting thread, it migth fail but worth a shot.

It seems clear to me that and increasing number of 'pros' (by which I mean 'known' skiers), are using skis that are far more flexible than their 'out of the box' flex point. Off the top of my head examples include Kieran Mcveigh's Soul Riders, Max Hill's Afterbangs and all of Maximillian Smith's various scott skis. They all flex like OG EP Pros but are nowhere near that soft from the factory, pretty sure these guys aren't 'pro' enough to have specially made pairs so:

How do they achieve this flexibility?
Do you (NSers) do anything to your own skis?