A buddy has an odd problem with his timer. It was working fine but started having trouble with it not arming the ESC. After troubleshooting it for a while, we figured out that it would operate fine if we plugged into what you'd use for a twin motor. The connector for the primary motor wasn't sending a signal to the esc to let it arm. He was also having trouble with the ESC not governing but I believe that may have been a setting issue in the ESC.
Not sure of the firmware version. Castle Creations Edge 75.

Thanks, Matt