I'm interested in using this wall mount arm, but I'm curious about the difference between this and the LX Sit-Stand Wall Mount Monitor Arm, especially given the $100 price difference.
I don't think the keyboard tray is quite wide enough, and the mouse tray is definitely way too small. So I'll probably end up fabricating and attaching my own keyboard/mouse platform. If I'm making my own platform anyway, it seems like it would make more sense to get the LX Sit-Stand Wall Mount Monitor Arm and attach my keyboard platform using some VESA hack.
What do I give up if I do this? Range of motion? Stability as a typing platform?