Slight problems with bodymovers

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I have four body movers within a root part of my model.
The body gyro is (supposed) to prevent the model from rolling.
The body position prevents the model from falling due to gravity, with its max force set to (0, inf, 0).
While the last two, body velocity and other body gyro makes the model move and rotate respectively.

I have namely two (I think) problems I’ve encountered.
One, when starting the game, the submarine begins moving very slowly to the right. If I was to guess why this is happening it might have to do with the body position? (I doubt it)
I’m unsure why this is happening and how to solve this.
https://gyazo.com/5d576abda1b4fc2f7a81fc9b17bad652

While the other problem has to do with the body gyro that’s supposed to stop the model from rolling, it just isn’t working. As you can see in the image below, after a while, the model begins to roll slightly.
Is the body gyro not working?
I thought just simply putting a body gyro inside of a part and setting all its max torque to 0 would stop the model from rolling, or is it because I have two body gyros in the same part?

A BodyGyro with MaxTorques set to 0 won’t do anything because it has no force available to align itself.
2 gyros in the same model will (I believe) just fight each other and the stronger will win.

Have you looked at free model planes, cars or boats that use bodymovers to see how they were done? I can’t remember if you’d mentioned them in your other posts.

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