I found it to be very easy to understand and modify the yaml files. I was able to do what I wanted and then change it again by moving the keys around so it to feel better. I see that I still want to do other changes. When I have something stable I think I’ll write a post about my new layout.
I looked at it briefly yesterday. The first thing that I found is that I did not know YAML. So I went off to read about YAML. At a superficial level it looks simple, and mostly comprehensible without more documentation. I dare say I could change the label on a button or the size of a button etc. Making Ctrl non-sticky looked as if it might require looking at the code too.