the caliper bracket is modular so you can have one or two. Its up to personal preference. Im gonna go ahead and test the dual setup and see if it makes a difference isolating the functions and making the hoses a more direct route. I bet its easier to bleed the hydro, thats always a bitch.
You can see here in the mockup how everything is symmetrical and you can choose one caliper or two calipers without effecting the main structure, also being modular allows for custom brackets to adapt any brand, any size caliper mounting pattern to the base.