Wow! Beautiful materials. Beautiful design. Skillful execution. I love the idea with the lights and want to steal it!
I would just urge though you keep a close eye on the cross members that hold the side monitors based upon a tapped center to the 40X40s. That hole was fluted, which means you tapped about half as much metal as you would have had the core been a smooth bore. Aluminum is already soft, and with half as much there is some possibility the bolt will come out. What will happen is the lower brace will act like a fulcrum and the pressure will all be on the upper brace which could seperate and dump your monitor. Certainly I would not suggest a super-ultrawide held in position this way since they're twice as heavy, create a much longer moment arm ( the distance from the weight to the support is the multiplier for the torque generated--twice the distance is twice the torque) and becasue super-ultrawides cost way too much to dump on the floor while you're beating down a Hornet.
Really great stuff!