The original Gunman writeup is more interesting and detailed:
Previous discussion (merge candidate?) here: https://www.lobste.rs/s/ceuslj/learning_from_the_enemy_the_gunman_project
The pdf is very interesting and very engagingly written. Thanks for the link!
For some reason the above link requires me to login to lobste.rs. The following link (w.o. www) does not