I'm considering a keyboard layout for Vim and Windows users these days.
This is my current design.

It has two DIP switches:
DIS SW | Key | On | Off |
SW1 | Fn | Caps | Fn |
| Caps | Fn | Caps |
SW2 | Fn | Ctrl | Fn |
| Ctrl | Fn | Ctrl |
I really hope the next version of GH's keyboards can consider this layout.
If somebody can assemble one for me, please let me know. I can pay it if the cost is not very high;D