I printed this Microsoft Surface stand for a friend of mine,. He uses an external monitor as main monitor and the screen of the surface as a second monitor. This stand gives you the ability to arrange the two screens above eachother in a somehow ergonomical way by simply place the standard Surface dock on top of this base.

https://www.youtube.com/watch?v=T2wUbd5-Xuk

When printing in ABS, decide if you need to use a brim or raft to eliminate warping, especially the crossbar is prone to warping due to its long thin shape