Dynamic Block with multiple Rotates gettin' wonky

[ColinPearson]

Hey y'all...

I'm stumped on this one.  I have this block that I've recreated a simplified version here to illustrate my issue.  I would like to be able to Rotate everything via any one of the Grips at the center of the 2 yellow and/or 1 blue circles .  Those 3 circles are not collinear.  I also need to be able to Rotate the purple rectangle with respect to the green rectangle - and I need to carry the two yellow circles along with that Rotation.  So far I can do all of this, but here's the rub: After rotating the purple rectangle, I still would like the Grips in the middle of the yellow circles to Rotate everything about the initial origin point.  I know that Rotating the purple/yellow changes the radius from the origin to wherever those yellow circles wind up though, so the thing acts predictably not-like-I-want-it.

 

The purple rectangle is supposed to be continuously variable, or I would just make a couple Viz States at a few intermediate angles, and give each their own Rotation Parameters/Rotate Actions.

 

I also though about having the Grips kina-close to the yellow circle but not worrying too much if they got off a bit, but the whole point of this would be to use the Grips to line the whole Block up based on particulars of the job. 

 

Any thoughts?    THANK YOU!!

test block.dwg