Le Potato / Pi 3 Screwless Lightweight Stand

This is a lightweight stand for most Pi-3 compatible boards, it does not require any other hardware and it just attaches with friction, its not a very secure fit but it should not detach under normal use, but you can also "plastic weld" it in place using a soldering iron. 

(it has only been tested on the Le Potato though it should fit most Pi-3 compatible boards only the Le Potato has been tested)