Replying to my own question, but for others who may be curious. The Pelican 1470 is a great fit. You can technically fit your PSU in there too. I bought one from a dude who has foam set up for his RYTM, but I’m going to get new foam and have the whole space dedicated to the OT itself probably. Anyway, it’s carry-on friendly if you’re flying and DOES fit the Analog RYTM / Analog Four / Octatrack line of boxes.