Fashioning the bow and improvised arrow, plus preliminary testing to check if the contraption even works (it does, just about), takes the better part of 3 hours. Threading the arrow through the tiny gaps in the cell door while still being able to aim the bow behind it is another thing entirely. Rust's considerable experience with bow hunting should tell him after the first few attempts that the poor angle plus heavily improvised materials simply isn't going to work in his favor, so I imagine he'd give up soon after that and go for the "direct spear throwing" method instead.

The alternative - though just as clumsy - does allow Rust more attempts. After several more hours (just before the start of Morning 005, let's say), Rust is finally able to snag the drone firmly by the carapace, which a tug confirms is good enough to hold it in place while he cinches the drone towards him across the floor. When the drone is about a foot away from the cell, the door lifts open on its own.

Of course, the belt is still wrapped around the bars, and the drone is still attached to the other side of it. The drone goes up and swings wildly into the cell, its prongs crackling to life with electricity.