Quote from jonjan:
There are flat VESA's that I'm sure mount much easier, but they won't help for creating a direct line of sight. I made the stand out of 3 folding pieces of wood, to help with the horizontal tilt. Getting the placement of the VESA's on the wood took some time to figure out, since the center moves if you fold the mount sideways.
JonJan
and... it's difficult to see, but I have the stand secured to the desk (with the brass clamps in the photo).. otherwise the stand would almost surely fall forwards with the weight of the monitors being ~120 pounds, and the stand feet being so small.