recently I bought the “Heavy Configuration Retrofit Kit” but I have a strange behavior of the BR2. It seems the fornt/left vertical motor to operate more powerful than the others. The result that I can’t even dive or re-surface. When I use 75% of power percent the BR2 almost flip! Any idea/help? The software is in last version and all the vertical thrusters are new. Is possible to have any problem with the ESC? I can’t think anything else. Is there any kind of test or diagnostic so as to decide what is the problem? Everything else is working fine (lateral thrusters, light, gripper, video, etc).