Also, I see possible issues:

Officer never stated that he tested or operated the RADAR unit per the manufacture's recommended methods ...

Officer did not say he paced the vehicle.

Officer did not say that he is trained to visually estimate speed

And the State of Washington did not train him; the state is not an expert in any of the methods listed - it is simply a corporation

His statement saying that "he was trained in the following devices" does not actually list any device in that paragraph ---

Nobody can be 100% certain ...

An good argument could be made that he actually measured his own moving vehicle too from the statements that he made