Sorry, the new UI looks great, but triple screen setup is a complete mystery to me. For starters, what's the difference between "individual" and "shared"? Is that for people who have something like Nvidia surround enabled vs those that don't?
When you have Shared selected, you only set a single distance (same for all screens) and set a single angle (so both side screens need to be set at the same angle as well). With Individual, you can set the distance and angle of each screen separately. nVidia surround on lets you run fullscreen, and you can configure all those options. Not using nvidia surround, you can still run your triple resolution in windowed mode (via config_dx11.ini editing) and then use the same config in the game.
If anyone has thought about DIY some bezel free kits, I'd say do it. I was sceptical and certainly didn't want to pay the $200 odd dollars for the Asus kit so grabbed a free non working 39"TV from marketplace and had a go. This is the first attempt and I'm going to neaten it up and keep it.