That's some great looking plumbing.
Very cool box for your power bricks. Are you concerned about heat build up at all?
Sorry if already mentioned but I noticed you had a metal clamp band on the return pump? If so you will want to replace that will a plastic one. I actually don't need one on MAG 5 at all.
Yet another build that makes me really want a 3d printer LOL. Really liking the custom holders for the power strips and controllers


You should try Slic3r. Cura is nice, but it doesn't give you any real configuration capabilities.
With Slic3r, you can do a 10% infill, but still run the outer edge slower to get a cleaner print.
I think Cura's 'fast' configuration also increases the layer height.
It took me quite a few test cube prints to fully dial in my Slic3r settings, but it was worth it. The only thing I have left to fix is I get some sagging in my bridges. I've learned to just make my designs to limit bridging.