I found u can go Oob after u do the cover thing, here in the video i show u how to get there, but i don't know i've u can do something more after that. I'll be lf something but i can't expect to much. Saves about 40s or so.
i managed to get on the top of the room, but it's imposible to go trough. I've i don't find something i'll go just to speedrun the game.