Sump/Plumbing Diagram.....Please Review/Critique/Suggest My Setup

[BigBoi5680]

Got the idea to draw this up from another member who posted. This is how I drew it up in my head and put it down on paper. This was also not my first choice with how to set up the sump, but when I got it, it was already laid out this way so I decided to make it work.

Are there too many/few valves/unions?

Was also thinking about running 2 3/4 Sea Swirls, both side by side between the overflows to increase flow in the tank along with my Tunzes.

ALL critiques/suggestions are welcomed, really want to get insight so that I can make the necessary adjustments.....