I'm using a Lenovo Thinkcenter M93pp tiny with Kodi as Mediacenter and game station and my TV has a 200x200 VESA mount.
So why not putting the computer on the back of the tv?

There are no special requirements to print this thing. You need one time the mount and two rails. Then put the tiny computer in the mount and fix the rails with M4 screws and the complete thing on the VESA mount and you are done.