Most of the code resides in my userspace and is heavily based upon [Drashna's work](https://github.com/qmk/qmk_firmware/tree/master/users/drashna)... although considerably slimmed down.
On that note, I use a separate workspace when making changes to my layouts or userspace. In that repo, there is a tool that does this for me. See [JacobJerrell/qmk_layouts/tools/](https://github.com/JacobJerrell/qmk_layouts/tree/master/tools)
I don't have the underglow or backlit versions so the 3 LEDs on the right board are used for layer indication if not on the base layer. If you're on the base layer, they're used for mod-key indicators.