You'd have issues with stability though. Looking at some images of astronauts inside the ISS I can see that almost all of the pictures where they're performing

You'd have issues with stability though. Looking at some images of astronauts inside the ISS I can see that almost all of the pictures where they're performing a task inside the station, they tuck their feet under holding bars to keep from drifting away from what they're doing. I imagine that would be quite complicated if you didn't have any legs, and it would probably be hard to keep from swaying side-to-side of you only have one leg. I'm sure there are other complications too, microgravity is a much more hostile environment than you might think!