Actually my "feature" request is an example of how the simplest things get overlooked. For all the wall-mountable units Obi should include a template. That can be as simple as two marks on the edge of the quick-start guide.
And then the printer prints the guide at a slightly different size than anticipated and your marks are a quarter of an inch off, and then people really
get mad when they realize they've punched a useless hole in the wall!
It isn't rocket science - the holes on the OBi110 and the OBi202 are 3⅝ inches (92 mm) apart. You use this amazing device called a ruler (ask your kids, they probably have a few), and draw short vertical lines that distance apart (measure first in case they change the distance between the holes for some reason). Then (optionally) use a level or a carpenter's square to make the horizontal cross lines (a rectangular piece of paper, held or taped so that the edge lines up with the adjacent wall in a corner of the room, can sometimes replace the carpenter's square in a pinch).