Known issues

1. can't type self, else, last quickly
2. can't type hold arrows
3. []-=_+{} are hard to use, maybe i just need to train them
4. need to train shifted input, such as camel case
5. need ability to hold backspace

Featrues

1. numbers works fine
2. both spaces works as layer switch to number layer, mirroring it is a nice idea
3. shift+layer switch combo works fine if you use mirrored hand

Open questions

1. am I use only left hand backspace and right hand enter?