Quick (and dirty) remix of SmithRC's excellent Xbox 360/One controller hanger to add a flat top for "under mounting" so that it can be attached (via adhesive) to a shelf/desk bottom and act as a sort of "hanger" for my controller.

Personally I recommend printing it so that the "back" faces the buildplate and then use supports, that way all the rough edges left behind when the supports are broken off will face away from you and likely be hidden, but there are multiple viable options for printing and orientation depending on your printer and how creative you want to get with supports/etc.