V2 actuator on the right:
The first OpenTorque v2 unit is built and working successfully, so I'm releasing the design files. You can get them at https://github.com/G-Levine/OpenTorque-Actuator. They're licensed under Creative Commons BY-SA 4.0, so feel free to modify them and use them in your own projects.
I'm currently prioritizing passive cooling because my walking robot will have a low duty cycle on the motors. As a result, this version is releasing with passive cooling only. Active air-cooling will come in a future update. I'd recommend it if you plan on building a robot arm, as the duty cycle on an arm is near 100%.
Other future updates will include support for the single-axis ODrive board (once it's released). This will allow daisy-chained power and data connections between actuators, greatly simplifying the wiring.