Welp, that was a waist of time. I bought an Ergotech Freedom Arm HD from amazon. Solid build, heavy, simple installation. Just one problem, the tension arm is spring based. Now when I watched a review of this thing, the guy moved the arm all over the place and was able to set the arm in various positions.

So what's my problem? Apparently my 21.5inch Huion GT-220 display is too light. Oh, it fits on there beautifully and moves around well enough, but I can't lower the screen to drawing level, it just pops right back up. Don't misunderstand, the product itself is very well made and sturdy. Perfect for a large monitor in the 24"-27" range, but unless the one I got was defective, I would advise against purchasing this for a pen display.