my 4 layer corne split keyboard layout (germany)

I’ve been using my corne split keyboard for about 3 weeks now and during that time I’ve made a couple of changes to the layout.

Right now I am quite happy with the content I am typing these days but I guess over time I am still going to optimize further.

Nevertheless I want to document my layout here, in a picture and with the json file that can be used with the QMK configurator.