[Pipindula]

explaning the causes of suffering the Buddha covered the whole issue of cause and effect imo.

By explaining the cause of suffering the Buddha covered the cause of suffering. There is no such thing called the "whole issue of cause and effect" addressed in Buddhism irrespective of your opinion on the matter. Causation in DO is relevant to the origination and cessation of suffering only.

Now can you name one action that is not driven by the above three causes?

Any action that is not driven by the above three causes is an action that is not driven by the above three causes. You need to practice and verify this for yourself.

Let's say I asked you to imagine something and you imagined a bun in your head. Can you prove to me that you imagined a bun? You can't. Your imagination/realization is only verifiable to you. Similarly, I cannot put realizations into your head. As you yourself said, the Buddha just showed you the path. Walking it is upto you.

Now, i know that you can hardly find two Buddhists agree on the interpretations of the four noble truths

Really? I think most Buddhists who have spent some time practicing the teachings agree with the interpretations. Unlike some of the Buddha's other teachings, the four noble truths are regarded the same across all schools.

Eliminating the cause becomes another cause

More nonsense. When the cause is eliminated the result will also be eliminated thereby breaking the cyclic routine which exists only when causation exists.