Guys, there’s a slight change needed to the 412 assembling process. Legs of the bottom-left switch of the head must be cut short (see pic below) – otherwise, it shorts pins of the KY-083 board under it. I have updated assembly manual accordingly.
If you have problems with multiple button presses and/or hat switch only working in 2 directions, this is most likely the case, please update.
![](http://hc625ma.org/wp-content/uploads/2019/03/IMG_20190316_111338-e1552727100545-1024x1024.jpg)