Make sure hat your head is positioned at the intersection of a perpendicular line drawn for the enter of each screen. No matter what you do when you turn or climb the horizon doesn’t stay straight. I haven’t tried this, but if you watch videos of folks who have built home cockpits, and have huge monitors, the side monitors are at 90 degrees from the center monitor. I’ve nudged one of my monitors to a greater angle and it improved things, except the monitor was half off the table.