That’s my current method as well. For more info, there’s discussion as well as a description of what buttons/knobs map where on the organelle HERE
If I recall correctly, there is some talk near the bottom of the thread, by thetechnobear and others, indicating it shouldn’t be too hard to set things up to boot form a single SD into either the Organelle or EYESY OS, but I don’t believe anyone has done this yet (would personally love to find out if someone has!).