well yes, the screw doesn't exactly bottom out so it would be unscrewable beyond that point, it's just extremely tight already. I don't also exactly have a top cap since it popped off due to overtightening the screw and it was made of cheap plastic, it's hard to explain so would probably need a picture.

Looks like I'm gonna buy a new star nut in this case, eventhough they are extremely overpriced in Estonia, like 5 € each, wtf. But I guess I must live with it then.

I'm gonna post a picture of my stem and top cap in their current state here tomorrow.