The main change is that the thumb cluster was adapted from the [ManuForm keyboard](https://github.com/jeffgran/ManuForm) ([geekhack](https://geekhack.org/index.php?topic=46015.0)). The walls were changed to just drop to the floor. The keyboard is paramaterized to allow the following:
I plan to use a Teensy 2++ in each half. Then, I have enough channels to wire straight to each key switch. Diodes are not needed. Then, I can connect them with a serial connection, and adapt the QMK firmware for the [Let's split keyboard](https://github.com/qmk/qmk_firmware/tree/master/keyboards/lets_split) that implements this approach. Each half can be master.
This doesn't have a bottom. It has hex holes designed for 9- or 10-mm long M3 female-female spacers. Then, I can use a M3 wafer-head screws to connect a bottom plate. If wires aren't dangling, a bottom plate may not be needed.
The source code for generating the models (everything excluding the [things/](things/) and [resources/](resources/) directories is distributed under the [GNU AFFERO GENERAL PUBLIC LICENSE Version 3](LICENSE). The generated models and PCB designs are distributed under the [Creative Commons Attribution-NonCommercial-ShareAlike License Version 3.0](LICENSE-models).