Love to dream swaddle 50/50

I just got my son this swaddle because I’m trying to transition him from a regular swaddle to sleeping in sacks now. His reflex startle is still really bad. When do you start taking the wings off the sides to get use to their arms? I put him in the swaddle for the first time today. He fought his sleep for about 30 mins because he hated it but now that he’s in it He’s sleeping really good. I want him to get use to his hands at his face first but don’t know how long I should do that before taking off one wing