Almost forgot, the single restriction on just the up line works better on larger gear (more volume). If you still get a bounce when extending, or on small cylinders, a restriction on both lines is the way to go.
If using wheel collars, set the one on the up side first, then the one on the down line. I have the small ESM190, and those gear had a terrible bounce on the extend cycle using the red Robart valve. Put restrictors in both lines, and they were as smooth as silk