Not strictly related to the content of the article, but also kinda: I cannot stand the low-effort MSPaint-esque drawings in reverse engineering articles. It makes me immediately distrustful of the content.
Diagramming tools are a dime a dozen, I was able to find the CC1121 part in EasyEDA in less than a minute. Alternatively, you’re allowed to use pencil and paper to draw schematics. Many applications exist for scanning documents with a phone and, in my personal experience, they can work quite well for diagrams drawn by hand.
The scribbled MS paint schematics are not useful for anyone.