I have been reading the book Opening the Hand of Thought and found myself wondering how Soto Zen envisions the factors of the Eightfold Path with an especial regard to Right Effort. In brief, it is understood in the Pali Canon as follows:

The nature of the mental process effects a division of right effort into four "great endeavours":

(1) to prevent the arising of unarisen unwholesome states;

(2) to abandon unwholesome states that have already arisen;

(3) to arouse wholesome states that have not yet arisen;

(4) to maintain and perfect wholesome states already arisen.
Source: http://www.vipassana.com/resources/8fp5.php

Does Zen use the same understanding, if not is there another formulation of the 8FP and Right Effort?