The matrix on this PCB is kinda wonky. A0 is only used on two keys and B0 is only used on the top right cluster. Started with B1 and A1 as those are the first rows and columns when starting from Escape. Can change this around if necessary, but it will be a lot of work.  ![matrix](https://user-images.githubusercontent.com/46304257/69739176-888c7000-1137-11ea-8b8e-fda8433fd54b.png)  