LazyWP that rig looks awesome that looks like it would work great.  Mathis Imp. InWinner S.D. Or Valentine NE. has one on their Haybuster processors looks like it would work good, we built our own with a simple roller pump that works fine we put liquid on straw last year nd the cows would pass up second cutting alfalfa and go for the straw with liquid makes for some cheap good quality feed.