Wow, easiest install ever through the openSUSE wiki. Didn’t have to touch a single text file.
30" center 2560x1600 flanked by rotated 20" 1200x1600 each side. The KDE Display Config gui tool is buggy, but it worked. When I return to the tool, it doesn’t show the side screens rotated.
Though, I had to go into Configure Desktop -> Desktop Effects -> Advanced -> Compositing Type -> from XRender to OpenGL 3.1, otherwise it was insanely slow. Nouveau had been giving me on-screen corruption, like swapping around lines of text, which is REALLY dangerous and totally unacceptable.