Gaining

Ooof, I feel you there. I am always hungry basically

Well, if you get it stretched out .... yes... why do you think desperate people have gastric surgery?

If you stretch it just a little, it can contract back over time ... if you deprive yourself of course. But if you keep stretching it then it can't contract back that much.

Skinny competitive eaters must have intense discipline to not keep eating and gaining!

I don't know about permanently.

If I take too long of a break from stuffing it seems my appetite goes back down and I have to work on increasing it again.

It also still seems like a triple burger (there's 3/4's of a pound of beef on that burger) combo from Whataburger will still satisfy. I want to get to the point where it won't be enough.

Is there a point where the dam will break so to speak, and it will stay higher?

Precisely!
And why not stuff yourself? It feels so GOOD!

I heard somewhere that after a good amount of stretching the capacity it takes 2 weeks of back to normal meals for the stomach to start reverting to the prior size. Of course going back to normal meals you will feel the need to on a few occasions to stuff.