I've just received 3 27" 1920*1080 monitors and would like to know how to position them properly. 
They are AOC AG272FCX models, which feature a 1800mm radius curved screen.   
Should the monitors be lined up in one "curved plane" or the outer ones angled inwards by how many default degrees?   
What is the default viewing/camera angle? Can one change the angle and projection? 
Should I use 1 camera or 3 camera to minimize distortion?   
Also, how to mount them? I've looked into 3 screen desk stands, like Newstar PFMA-D700D3, but these seem for inline setup, which probably is unsuitable for curved screens. Ideally, they should be on a high stand to be right above the Helios touch screen, approximately at eye level.   
If I add two more, in 
L-L-L 
L-_-L ( _ is the Helios display) 
configuration, what would that bring? I'd like to glance down at the ground a little while in forwards vision ...   
The whole array is powered by nVidia 1080 graphics cards with the double SLI bridge. nVidia surround is set up, but all the 3 displays + 1 accessory need to be hooked up to the upper card. The setup as explained here  
https://www.geforce.com/hardware/technology/surround/system-requirements 
  
doesn't work. I can set it up, but it won't survive a reboot. 
It says 2D Surround-SLI is enabled, but how can I make sure   
PS: I've found the 40" screen unsatisfactory, not due to its size, but to its 19:10 aspect ratio which offered too little peripheral vision. Also, the DP 1.2 didn't allow it to be driven at 60 Hz.   
Thanks.