- arrows and other cursor keys grouped on left hand
- Math operators grouped
- Boolean & Logical operators grouped
- squiggles/parens brackets/angles grouped
- tab/backspace/del/return grouped
- punctuation grouped
- CTRL/ALT reversed (windows style)
- number related symbols duplicated on num layer at same locations
- moved alphas from thumb2 to fingers
- a few character frequency optimizations like swaps on thumb1
only thing i'm not sure about is how the center buttons will work on M4G - like can I do a chord that involves non-character inputs?