Class Relation diagram in ExperT automation suite

I have posted "ExperT" automation for end-end performance test with Watir and Httpwatch for a while: http://joychester.blogspot.com/2010/02/preview-of-expert-end-to-end.html,
Here I made one simple class diagram for their relationship between these main classes:


And created Github account already, hope to open source the code soon...